List of Sonic X episodes

Sonic X is an anime series based on the Sonic the Hedgehog video game series. It originally ran consecutively on Sundays from April 6, 2003 to March 28, 2004 with a total of 52 episodes (collectively known as the Japanese "Series 1"). Episodes 53-78 (collectively known as "Series 2") never were aired on TV or released on DVD in Japan but were available through rental streaming services (episodes 53-78 were first broadcast on TV in some other countries before they aired on UK/US Television). For the English dub produced by 4Kids (which aired on FOX on the Saturday morning block FoxBox, later renamed 4Kids TV, from 2003 to 2006), episodes 1-52 were referred to as Seasons 1 and 2, each 26 episodes long, and episodes 53-78 were referred to as Season 3; but the Saga Set DVD releases split the episodes into six seasons, each containing 13 episodes. The airdates for TV Tokyo are listed on the left, while the airdates for the 4Kids English dub are on the right.

Episode list

Series 1/Season 1

#	Translated original title (English dub title) Original title (Japanese)	Original airdate (Japan)	Original airdate (US)
1	"Enter the Supersonic Hero!" ("Chaos Control Freaks") "Chō Onsoku Hīrō Tōjō!" (超音速ヒーロー登場！)	April 6, 2003	August 23, 2003
Sonic the Hedgehog arrives at Dr. Eggman's base to rescue Cream and Cheese and retrieve the seven Chaos Emeralds. Tails and Amy help him, but they are attacked by robots and are blown away from the base. Knuckles saves them. Sonic tries to battle Eggman, but the machine that controls the Emeralds is damaged by the fight and it makes Chaos Control. Sonic finds himself in a different world full of humans. Suddenly, the police attack him, but fail the chase because Sonic is too fast. The S-Team and their leader Sam Speed try to get rid of him, but Sonic outruns them and jumps to the sky. He then falls above the city called Station Square. Suddenly, Sonic falls into a pool and he cannot swim. Sonic is then rescued by Chris Thorndyke, and they introduce themselves to each other.
2	"Infiltrate! Area 99" ("Sonic to the Rescue") "Sennyū! Eria Kyūjūkyū" (潜入！エリア９９)	April 13, 2003	September 13, 2003
Sonic, having been saved from drowning by Chris, stays at his house in order to figure out his situation. After being introduced to Chris' grandfather, Chuck Thorndyke, they learn that Cream and Cheese have been captured by the government and taken to a military base called Area 99 for experimentation. The two help Sonic infiltrate the base, and he is able to rescue Cream and Cheese after the electricity goes out. The laser cameras attack Sonic, Cream and Cheese, but they successfully escape. Afterwards, Tails, who had shut down the electricity earlier, rescues them with his biplane, the Tornado. They travel back to Chris' home, and realize that more of them must have been transported, including Dr. Eggman, who has decided that the new planet will be the start of his new empire.
3	"Dr. Eggman's Ambition" ("Missile Wrist Rampage") "Dokutā Egguman no Yabō" (Ｄｒ．エッグマンの野望)	April 20, 2003	September 20, 2003
Eggman begins his attempt to take over by attacking the nearest city with one of his robots, E-23 Missile Wrist. At the same time, Amy and Knuckles are hiding in the sewers to avoid detection and are formulating a plan to return to their world. Meanwhile, Sonic leaves Chris' house to go for a walk in city. Chris, scared the police will find Sonic, decides to find him, but the search is not working. After Eggman's robot reaches the city and begins its path of destruction, Eggman announces his intentions on television and demands the city's surrender. This causes Tails and Chris to head out on the Tornado, but prove to be no match for it and are quickly struck down. Knuckles and Amy attempt help the two of them, but Amy ends up captured by Eggman. Sonic soon learns of the attacks, manages to save Amy, (while doing hilarious dances on the robot's 'hands') and destroys the machine. Amy returns to Chris' house with Sonic, but Knuckles decides against this and leaves by himself.
4	"Get the Chaos Emerald!" ("Chaos Emerald Chaos") "Kaosu Emerarudo wo Te ni Irero!" (カオスエメラルドを手に入れろ！)	April 27, 2003	September 27, 2003
The group and Dr. Eggman are under observation by the government. They decide to send an operative, Mr. Stewart, into the school system as a teacher to monitor Chris. Afterwards, a Chaos Emerald located at a construction site causes a machine to go berserk, which alerts Eggman, Sonic's group, Chris, and Mr. Stewart. They all eventually reach the site. Chris manages to sneak up on Eggman, who has found the emerald. Eggman manages to take the emerald away from Chris and runs to his little plane, but Chris soon catches up with him and manages to take the emerald away from Eggman. During that time Chris is knocked off of Eggman's plane and starts to fall. Mr. Stewart, who happens to be following Chris attempts to save him, but Sonic reaches him first.
5	"Clash!! Sonic vs Knuckles" ("Cracking Knuckles") "Gekitotsu!! Sonikku Bāsazu Nakkuruzu" (激突！！ソニックｖｓナックルズ)	May 4, 2003	October 4, 2003
Knuckles, frantic to return to the Master Emerald, is told by Dr. Eggman that Sonic is to blame for their predicament and that Sonic believes that Earth is far better than their world. Meanwhile, Sonic and the gang are spotted by Ella and Mr. Tanaka, but Chris tricks them into thinking that they are toys. Chris, Tails, and Amy find a lead on a Chaos Emerald in Silver Valley, and head towards that area. Afterwards, one of Eggman's robots delivers a message from Knuckles to Sonic, who challenges him to a duel in the same area. Eggman manages to capture Chris, Tails and Amy with a robot and reveals to them that it was a trap. Knuckles confronts Sonic, demanding the Chaos Emeralds. After Sonic and Knuckles fight for a while, Amy is able to damage the robot and signal Sonic. After the robot is destroyed, Knuckles realizes that he was manipulated, attacks Eggman, and leaves on his own once again.
6	"Fierce Battle! School Wars" ("Techno Teacher") "Nessen! Sukūru Wōzu" (熱戦！スクール・ウォーズ)	May 11, 2003	October 11, 2003
Eggman decides to focus on brainwashing children in order to achieve his goals of a dictatorship. He sends a robot called "Intelligente" to Chris' school in order to replace their teacher and focus their curriculum on himself. After forcing Mr. Stewart out of his classroom, Intelligente soon finds that he likes the children, and ignores Eggman's original orders. After Eggman threatens to disassemble him, Intelligente sets out to complete his original mission, and he is destroyed by Sonic. Chris' parents, Nelson Thorndyke and Lindsey Thorndyke, return home soon afterwards.
7	"Giant Free-for-All! Chris' House Party" ("Party Hardly") "Daikonsen! Kurisu no Hōmu Pāti" (大混戦！クリスのホームパーティ)	May 18, 2003	October 18, 2003
Lindsey, glad to be home with her son, decides to throw a party. Sam and Mr. Stewart are invited. Meanwhile, Chris lets Cream and Cheese stay at his room in his absence and Cream and Cheese are bored. They decide to pick flowers. Cream and Cheese are wandering around the mansion when they overhear Lindsey being called away immediately to an important film shoot. Her crying as she calls herself a terrible mother for not being able to spend more time with Chris makes Cream and Cheese feel sorry for her. After she leaves, Chris makes a comment about his mother being rude for missing the party, although he does not mean it. Cream and Cheese, not knowing this, angrily yell at Chris about his mother's real reaction about having to leave, and then storm out. Ella and Mr. Tanaka finally know about Sonic and his friends. Chris is upset since Lindsey left and Cream was mad at him. Cream arrives and she is so happy for Chris. She makes Chris and Ella flower crowns as a token of appreciation. Note: First episode that does not feature Dr. Eggman.
8	"Emergency Launch! X-Tornado" ("Satellite Swindle") "Kinkyū Hasshin! Ekkusu Torunēdo" (緊急発進！Ｘトルネード)	May 25, 2003	October 25, 2003
Eggman launches his E-90 Super Sweeper robot to suck up television satellites and turn them into robot parts. Sonic and Tails try to stop the Sweeper, but the Tornado is quickly overwhelmed. To defeat the Super Sweeper, Tails teams up with Chuck to build the X-Tornado, a jet plane powered by the gang's Chaos Emerald. Tails shows everybody X-Tornado. Sonic and Tails, joined by Chris, once again go after the Super Sweeper. Sonic battles the robot, but he gets attacked. The machines go to outer space. Sonic is outside the plane and freezes. Tails and Chris use a Power Ring to defrost Sonic, allowing him to defeat the Super Sweeper. In the end, Sonic tells everybody he was helping and Tails and Chris are the heroes.
9	"Amy on the Beach" ("The Last Resort") "Nagisa no Emī" (渚のエミー)	June 1, 2003	November 1, 2003
The grand opening of the new hotel at the Emerald Coast starts. Amy daydreams about Sonic, and after seeing some lovers on the beach decides to make a bracelet out of shells to protect him from drowning. Eggman ruins her plans by showing up at the beach and wrecking the resort, luring Sonic to where he will be weakest, water. After the battle Eggman leaves and Amy decides to give Sonic the bracelet. While giving it to him, Sonic then realizes how much Amy cares for him. Eggman returns, inadvertently ruining Amy's bracelet and causing her to become mad. She then destroys the robot that was attacking Sonic. Amy tries to help Sonic by destroying Eggman's "flying chair" and falls in the ocean (while still holding the broken bracelet), and Sonic jumps in after her even though he is afraid of water. At the end he is seen wearing the bracelet.
10	"Fierce Fight! Sonic Baseball Team" ("Unfair Ball") "Gekitō! Sonikku Yakyūgun" (激闘！ソニック野球軍)	June 8, 2003	November 8, 2003
The episode starts at Chris' house where Sonic and the others are eating dinner. While enjoying the meal, Bokkun arrives with a message from Dr. Eggman saying he challenges Sonic and friends to a game of Baseball. Tails is flying above Station Square in the X-Tornado when he locates a Chaos Emerald. Tails lands in the place called Diamond Stadium where he meets his new friend Alfred Butler. Alfred shows Tails the Cyan Chaos Emerald that he had found and Tails shows him the Green Emerald. Eggman arrives and steals the Cyan Chaos Emerald, and almost as Eggman took the other Chaos Emerald from Tails, Knuckles arrives and smashes the giant robotic hand before Eggman could get the other emerald. Sonic and the others arrive shortly afterwards. Eggman decides to take both Chaos Emeralds if he won the game. Knuckles is reluctant to play at first, but when his pride is threatened he agrees. The match between Sonic's team and Eggman's team starts. As the game goes on, people begin to arrive at the stadium. Sonic's team eventually wins, but Eggman escapes with the Cyan Chaos Emerald.
11	"The Beautiful and Mysterious Thief Rouge" ("Fly Spy") "Utsukushiki Kaitō Rūju" (美しき怪盗ルージュ)	June 15, 2003	November 15, 2003
Rouge makes her appearance in an attempt to steal a gem from a museum, which she succeeds in. Not too long after that, the government reveals its plans to defeat Eggman by making a raid on his base, realizing they will need Sonic's help. To attempt to contact him, they use Mr. Stewart to plant a false message about a Chaos Emerald, which Chris happened to be painting in class, which is overheard by Rouge the Bat, a gem thief. She sends the gang off course and gets to the "Emerald" first, but is ambushed by government agents, who decide to recruit her instead. Teaming up with a special team of agents, Rouge infiltrates Eggman's base, planning all the while to steal the Cyan Chaos Emerald. Meanwhile, Agent Topaz is kidnapped by Eggman's new robot, but Rouge defeats the robot and saves Topaz. Rouge, Topaz and the agents escape from base. Meanwhile, Chris and his friend, Danny, who stayed up late searching for the "Emerald", realize that it was a hoax. Mr. Stewart apologizes if they stayed up too late looking for the "Emerald" and says that he was mistaken.
12	"Eggman's All-Out Base Attack! (Part one)" ("Beating Eggman, Part 1") "Egguman Kichi Sōkōgeki! (Zenpen)" (エッグマン基地 総攻撃！（前編）)	June 22, 2003	November 22, 2003
The President declares war on Eggman, launching a full aerial and naval attack on his base. While Knuckles sneaks aboard one of the planes, Rouge and the army infiltrate Eggman's base once more, and Sonic, Tails, Amy, Chris and another Chris' classmate Frances discover another Chaos Emerald. However, they find themselves at the mercy of Eggman's E-35 robot, which has a giant turbine that it uses to fly, and also generate gale-force winds. Tails tries to defeat the robot using the X-Cyclone (the name given to the X-Tornado when it transforms into a land-based vehicle), but he gets trashed by the wind.
13	"Eggman's All-Out Base Attack! (Part two)" ("Beating Eggman, Part 2") "Egguman Kichi Sōkōgeki! (Kōhen)" (エッグマン基地 総攻撃！（後編）)	June 29, 2003	November 29, 2003
Rouge, Topaz and the army are trying to find the generator room of Eggman's fortress. Knuckles is riding on a missile and he arrives at the base. Rouge and Knuckles team up inside Eggman's base to set the explosives in generator room, while Sonic confronts Eggman's robot Funfun. Eggman escapes with the Yellow Emerald, and uses it in his new robot Guerra-Hard with the Cyan Emerald. Sonic battles with Guerra-Hard, defeats it, and takes the emeralds. Meanwhile, Decoe and Bocoe trap Knuckles, Rouge, Topaz and the army inside the generator room after they set the timers on the explosives. Knuckles and Rouge try to escape by using their skills, but the time is going to run out. Sonic accidentally frees them and they escape. The base explodes. Sonic returns to the X-Tornado with the Cyan and Yellow Emeralds and the people begin know about Sonic and his friends.
14	"Chase the Hero Sonic!" ("That's What Friends Are for") "Eiyū Sonikku wo Oe!" (英雄ソニックを追え！)	July 6, 2003	December 6, 2003
Following Eggman's defeat, Sonic is invited to a party by the President, but he declines to take his new friend and another one of Chris' classmates Helen to an island. Tails, Amy, Cream, Chris and Chuck go to the party without Sonic. Jerome Wise, the President's secretary, launches an army mission to get Sonic. Sonic and Helen arrive at the island, but they are attacked by the army. Sonic and Helen commandeer a helicopter and escape. Sonic finds out it is late and he decides to bring Helen home. Helen confronts Sonic because the President is waiting for him. Sonic and Helen finally arrive at the party and Sonic meets the President. In the end, Helen tells the story to her parents. Note: Second episode that Eggman does not appear in.
15	"Raiding Egg Fort the Flying Fortress!" ("Skirmish in the sky") "Idōyōsai Eggu Fōto Shūrai!" (移動要塞エッグフォート襲来！)	July 13, 2003	December 13, 2003
Chris and the others plan to go shopping because they no longer need to hide from the public. Meanwhile, Eggman has created a battleship called the Egg Fort and goes to destroy Station Square. Sonic arrives and tries to battle Eggman, but he fails. Tails discovers the only way to defeat Eggman is by using the X-Tornado, which is still at Chris' home. Sam Speed arrives and takes Tails, Amy, Cream, Chris, and Ella home. At the same time, Sonic is attacked by Eggman's robots. Tails, Amy, Cream, Chris, Ella and Sam are attacked by Eggman's robots too, but Mr. Stewart saves them. He joins them on a mission called Take X-Tornado. The robots attack again, but Tanaka saves them with the X-Tornado. Tails, Amy, and Chris then use the jet to save Sonic. The X-Tornado then takes the fight out over the ocean to prevent damage to Station Square. Sonic defeats Eggman by using 2 Power Rings at once. The Egg Fort sinks below the ocean, but Sonic, Tails, Amy, and Chris are worried Eggman will soon be back.
16	"Aim for It! The Sunken Ship in the Southern Sea" ("Depths of Danger") "Mezase! Nankai no Chinbotsusen" (目指せ！南海の沈没船)	July 20, 2003	January 17, 2004
The Egg Fort turns out to have not been destroyed, but is damaged underwater. Meanwhile, Sonic and company go to Southern Sea for vacation. While riding to sea by X-Tornado, Tails finds out the another Chaos Emerald is near them, but it is underwater. They buy underwater items and the owner tells them the ship was sinking with the treasure. Sonic, Tails, Amy, Cream and Chris dive to underwater and finds the ship. Sonic and the gang find the treasure and Dark Blue Chaos Emerald. Egg Fort arrives and Eggman sends his robot Clurken to defeat Sonic. Sonic battles the robot as Sam assists Tails, Amy, Cream and Chris swim back to surface. Sonic is not running in underwater and he gets blown to the surface. Clurken arrives and attacks Sonic. Tails gives Sonic a power ring and Sonic defeats Clurken, but Egg Fort escapes.
17	"Knuckles! Clenched Fists of Anger" ("The Adventures of Knuckles & Hawk") "Nakkuruzu! Ikari no Tekken" (ナックルズ！怒りの鉄拳)	July 27, 2003	January 24, 2004
Knuckles goes to meet Hawk, a human he met who claims to have the Red Chaos Emerald. However, Knuckles must contend with several monsters first, then the threat of both Rouge the Bat and the robot E-91: a "kunoichi", or female ninja (Lady Ninja in the English dub). She kidnaps Hawk. Knuckles saves Hawk. Rouge steals the Chaos Emerald. E-91 tries to stop her. Rouge drops the emerald and she escapes. Knuckles and Hawk grab the emerald and defeat E-91. The next morning, Knuckles says goodbye to Hawk. Note: Sonic and his friends do not appear in this episode although Sonic was mentioned while Tails and Amy made cameos in flashbacks in this episode. Extra scene: In the Japanese version, when Hawk is held hostage, Knuckles gives the female ninja the emerald to free Hawk and he tosses the emerald to the female ninja; a "Thank You" card flies at the emerald to make it miss the ninja's hand. This scene is extended in the English dub, which shows Rouge throwing the "Thank You" card at the emerald.
18	"Huge Shoot-out on the Savanna!" ("The Dam Scam") "Sabanna no Dai Kettō!" (サバンナの大決闘！)	August 3, 2003	January 31, 2004
During a battle with the Egg Fort, the X-Tornado is shot down. Tails and Chris are separated from Sonic and try to fix the X-Tornado. Tails transforms it into X-Cyclone and he, and Chris go find Sonic. They find themselves near the site of a new dam, strangely (and illegally!) being built nowhere near water by evil Soviet communists. While Tails, and Chris work to stop the dam construction, Sonic takes on E65, a robot that can turn invisible. In the process, the construction has unintentionally helped Sonic, and Eggman unintentionally helps Tails, and Chris stop the dam construction. The builders are arrested by police and Sonic, Tails and Chris go back home.
19	"The Ghost of King Boom Boo in the Old Castle" ("Sonic's Scream Test") "Kojō no Bōrei Kingu Būbu" (古城の亡霊キングブーブ)	August 10, 2003	February 7, 2004
Sonic and co. go to visit Lindsey at a creepy old castle, where she is filming a movie with her in the lead role. As the camera man is filming he bumps into a strange artifact standing on a pedestal. When he moves it, Sonic, who is exploring an ancient underground basement area, starts to see purple light fill the room. Chris and the animals check out the area that Sonic is in and the encounter a bunch of ghosts, led by King Boom Boo, who are trapping everyone in a forcefield. Sonic gives Chris the artifact from earlier. As the ghosts are pulling Sonic in the forcefield, Amy and Chris go back to the pedestal the artifact was on, and it reads: "Appears under the moon, disappears under the sun". The two discover a secret entrance to the area under the pedestal. A group of ghosts lead them to a strange room. 'Sonic' tells Amy to put the artifact in a space in the wall with the moon side facing upwards. Amy does so and it releases King Boom Boo, who was impersonating Sonic to get Amy to free him. Amy tries to fight but ends up getting possessed. When Amy corners Chris, she stops attacking due to the strange artifact. Chris then remembers what the pedestal said and he switches the artifact to the sun side. Then, Sonic is released and he battles King Boom Boo. He appears to win but then the ghost chases after them. They arrive back to the movie shoot and Chris puts the artifact back on the pedestal sealing the ghost inside. Note: King Boom Boo is based on a boss with the same name and that Knuckles fought in Sonic Adventure 2.
20	"Departure! Egg Fort II" ("Cruise Blues") "Shutsugeki! Eggu Fōto Tsū" (出撃！エッグフォートⅡ)	August 17, 2003	February 14, 2004
Sonic and company take a trip on the Thorndyke yacht to see glaciers, but Sonic's fear of water and inability to relax gets to him; in the process, Sonic goes partially insane and desperately tries to return to shore. He tries to jump to shore off the boat 15 times! When a helicopter arrives, Sonic and the others assume it is his requested ride out, but Tanaka has arrived with senior citizens whose goal is to teach Sonic and friends to relax. Sonic tries harder than ever to leave, momentarily tricking Tails into wanting to return as well by saying that the X-Tornado is getting lonely, and even using Amy's crush on him to trick her into swinging her hammer all over the place, making her look like she's going crazy from the slow trip. However, Sonic is found out, and Amy gets very angry at him for saying things he did not mean. Eggman then surfaces with his new Egg Fort II. Sonic is relieved that there is some actual fun now, but is dismayed when he finds that he cannot run on the ice, and starts getting trashed by Eggman. Tails and Chris decide that they must help Sonic, but suddenly, Bokkun comes flying toward the Egg Fort II super fast, yelling at Eggman to let him in. Ella is chasing him with the X-Tornado, angry about a trick that Bokkun played on her. She transforms the X-Tornado into the X-Cyclone and kicks the Egg Fort II down. Even though Tails is all set to fly Sonic out in the X-Tornado, Sonic finally decides to stay and relax.
21	"Speed Match! Sonic vs Sam" ("Fast Friends") "Supīdo Shōbu! Sonikku bāsazu Samu" (スピード勝負！ソニックｖｓサム)	August 24, 2003	February 21, 2004
Chris' uncle Sam wants to race Sonic, but Sonic is not interested, even with Sam's new rocket engine in his car. After constant pestering and a threat by Eggman, Sonic gives in, and challenges Sam. Sonic and Sam are racing the Station Square streets, the bridge, desert and rocks. Eggman's robot tries to stop the race, but he fails. Tails, Amy, Cream, Chris, Chuck, Lindsey, Nelson, Ella and Tanaka are waiting for them. Sonic wins the race and Sam is defeated. The President's secretary tries to gain popularity by shaking hands with Sonic, but fails as he loses his job due to his negotiating with Eggman.
22	"Summer Vacation Diary - Chao Observation" ("Little Chao Lost") "Natsuyasumi Chao - na Kansatsu Nikki" (夏休み・チャオ〜な観察日記)	August 31, 2003	February 28, 2004
While on a hiking trip in Japan, Sonic and co. settle in and have fun. Cheese is swimming when a current blows him off course and into a stream. They find him again, and the river led him into a pool in a Chao colony. They take care of the Chao and play with them. However, the place is put in danger when Eggman, also hiking in the vicinity, shows up with a new robot, thinking that the gang is there because they found a Chaos Emerald. Eggman attacks the Chao but is defeated, however the destroyed robot is leaking oil into the lake; Sonic clears the lake by running around it with full speed.
23	"Mayhem! 6 Chaos Emeralds" ("Emerald Anniversary") "Daikonran! Shikkusu Kaosu Emerarudo" (大混乱！６カオスエメラルド)	September 7, 2003	March 6, 2004
Nelson buys a ring for Lindsey as an anniversary present, unaware that it is actually the Purple Chaos Emerald. Things go from bad to worse when Sonic and co., Knuckles, Rouge, and Eggman all show up looking for the Emerald. Stuart arrives too. Things are complicated further when the Chaos Emeralds that Sonic and friends collected come within close proximity to Nelson's Emerald; without time to adapt, the Emeralds give off massive quantities of destructive energy. Eggman steals Chaos Emerald. He sends the robot called Weazo to defeat Sonic and the others. Sonic and Knuckles defeat Weazo. Rouge tries to take the emerald from Eggman, but she fails. Eggman escapes with the emerald. Error: In multiple parts of the episode, Knuckles is shown having fingers, when he never originally had any.
24	"Wild Sonic! Strategic Capture Operation" ("How to Catch a Hedgehog") "Bōsō Sonikku! Hokaku Daisakusen" (暴走ソニック！捕獲大作戦)	September 14, 2003	March 13, 2004
While fighting a robot and trying to save Amy, Sonic accidentally gets a microchip stuck in his ear. When Sonic puts his finger in his ear to remove the chip, Amy thinks Sonic is not listening to her. When the chip receives a signal from Tanaka's car remote, it causes Sonic to start running nonstop. The gang then attempts to catch him, resulting in several badly planned attempts involving assistance from Knuckles and Sam. Tails discovers Sonic is running by magnetic power from farm. Tails and Amy (who are on X-Tornado) arrive to farm and spot a robot. Amy tries to battle him, but she is attacked. Sonic arrives, defeats the robot, drops the chip, saves Amy and stops running.
25	"The Last Chaos Emerald" ("A Dastardly Deed") "Saigo no Kaosu Emerarudo" (最後のカオスエメラルド)	September 21, 2003	March 20, 2004
With one Chaos Emerald left to find, everyone makes their plans. While Sonic and co. continue to search for the Emerald, Eggman decides to rely on his robot Lucky, a clumsy robot covered in good luck charms. Knuckles, desperate to get back to the Master Emerald, plans to make a temporary alliance with Eggman, and convinces Chris to help him. At the same time, Chris realizes that if Sonic and friends succeed in going home, he will lose his new friends. He begins to feel conflicted: he wants the best for his friends, but is scared of being alone. Ultimately, he decides it would be selfish to prevent them from leaving. Meanwhile, Lucky continues to go through one unlucky experience after another. Eggman tricks Knuckles and Chris into bringing him all their Chaos Emeralds, after which he kicks Knuckles off his ship, holds Chris prisoner, and then sets out to rendezvous with Lucky, who finally lived up to his name and found the White Emerald in a landfill.
26	"Birth! Super Sonic" ("Countdown to Chaos") "Tanjō! Sūpā Sonikku" (誕生！スーパーソニック)	September 28, 2003	March 27, 2004
With Chris as his prisoner, Eggman goes out to meet Lucky who has found the final Chaos Emerald. However, Eggman comes under attack by Sonic and several government robots. Lucky gives the seventh Chaos Emerald to Sonic. Unwilling to be pushed around, Eggman transforms the Egg Fort II into E-99 Egg Emperor (Eggsterminator in the English version). Sonic can outrun it easily, but then Eggman powers it up with a small amount of power from each of his six Chaos Emeralds (Green, Blue, Yellow, Cyan, Purple and Red). The government robots are destroyed, and Sonic starts to get pulverized by the super fast robot. However, the Egg Emperor starts to take in too much power from the Emeralds and starts going out of control, while still pummeling Sonic. All bruised and beaten up, Sonic is finally thrown into the sea. Chris, unable to bear the sight, breaks free of his restraints and grabs the Chaos Emeralds, jumping out the window. He is caught by Rouge, but the Chaos Emeralds fall into the sea. Chaos Control suddenly builds, as the six Chaos Emeralds dropped by Chris join with the seventh one still in Sonic's hand. Sonic emerges as Super Sonic (the first time Sonic is in his super form, according to the series and the surprised looks of his friends' faces) and destroys the Egg Emperor. Sonic then heals the wounded Chris in a white void, and tells him that he can finally go back to his own world. The boy breaks down in tears and begs Sonic to stay or take him to his world, because he claims that if he leaves, he will not be able to do anything. Sonic fades away, but when the void clears, Chris finds himself on a newly-appeared misty island, and sees Sonic (back in his normal form) walking out of the mist towards him. Note: The original TV broadcast uses an instrumental of "Shining Road", while home video releases use an insert song.

Series 1 (cont.)/Season 2

#	Translated original title (English dub title) Original title (Japanese)	Original airdate (Japan)	Original airdate (US)
27	"The Beginning of Disaster" ("Pure Chaos") "Wazawai no Hajimari" (災いのはじまり)	October 5, 2003	September 18, 2004
Six months have passed since Chaos Control occurred; instead of returning Sonic and company to their home world, two islands from their world (one of which is Angel Island) were brought here. Eggman has also been strangely quiet during these six months, though he has gotten the Red Chaos Emerald, and G.U.N. is desperately searching for him. Then new characters, Big the Cat and his little friend Froggy show up (after appearing in Episode 1 and not appearing until now). They find the Purple Chaos Emerald but then Froggy swallows a blue blob and grows a tail. Big is confused, and Froggy swallows the Chaos Emerald and runs away. Chasing Froggy, Big runs into Chris and Cream (who are leaving their short visit with Lindsey and have been given the Yellow Chaos Emerald) who tells them about Froggy. Chris and Cream help him search for Froggy. Big, Cream, and Chris run into a monster named Chaos, a shape shifting water creature, and it begins its attack. Sonic appears and comes to the rescue, defeating Chaos temporarily. Eggman then appears and tells Sonic and his friends about Chaos and how each time he gets a Chaos Emerald (one of which Eggman has already), Chaos becomes bigger and stronger. Eggman grabs the Yellow emerald and gives it and his Red Emerald to Chaos, and Sonic and Knuckles narrowly manage to defeat him. Note: This is the first episode to be based on the game Sonic Adventure.
28	"Chaos the Mysterious Creature" ("A Chaotic Day") "Nazo no Seimeitai Kaosu" (謎の生命体カオス)	October 12, 2003	September 25, 2004
The gang sets out on several quests: Sonic visits Tails' workshop and finds that Tails has already gained the Green Chaos Emerald, so they use that Emerald to find the cyan Chaos Emerald; Knuckles tries to find the pieces of the shattered Master Emerald (which was shattered by the Chaos creature when Knuckles was asleep); and Big and Chris to find Big's friend Froggy. Meanwhile, Amy finds a Flickie bird with a Chaos Emerald pendant and calls it Lily. After Sonic and Tails find the Cyan Chaos Emerald, Chaos undergoes another transformation after absorbing the Green and Cyan Emeralds, and Eggman unveils his new Egg Carrier. Sonic and Tails attack in the X-Tornado, but are overcome (Sonic survives; Tails injures his left arm and head), while Amy and Lily are abducted.
29	"Amy in Distress" ("A Robot Rebels") "Toraware no Emī" (囚われのエミー)	October 19, 2003	October 2, 2004
Sonic and Tails go after Amy, while Knuckles reassembles the Master Emerald to find that a piece is still missing. Big and Chris find Froggy, but lose him to E-102 Gamma. The other E-100s are transported elsewhere to be disabled, and Gamma is sent to bring Amy and Lily to Eggman. However, Amy manages to convince the robot to help her, and Gamma frees her from jail. Knuckles joins Sonic and Tails in mission, but as they arrive to Egg Carrier, the battle starts. Tails turns the X-Tornado into battle mode and fights with Eggman. The X-Tornado has no landing gear equipped, and the three heroes end up crash-landing on the Egg Carrier.
30	"The Egg Carrier Battle" ("Heads Up, Tails!") "Eggu Kyaria no Tatakai" (エッグキャリアの戦い)	October 26, 2003	October 9, 2004
Sonic, Tails, and Knuckles manage to infiltrate the Egg Carrier and free Amy, but Eggman manages to get the Dark Blue Chaos Emerald from Lily's pendant. Meanwhile Knuckles manages to get hold of the last piece of the Master Emerald. Amy, Tails, and Gamma leave the Egg Carrier while Big and Chris manage to find Froggy and free him. Eggman then captures Froggy, squeezing him until he spits out the Purple emerald, and feeds the Dark Blue and Purple Chaos Emeralds to Chaos. Sonic and Knuckles manage to defeat Chaos and recover the Emeralds. Afterwards, everyone somehow escapes the crashing Egg Carrier: Sonic hitches a ride with Eggman who eventually finds a mysterious ruin; Tails, Amy and Lily return to Chris' house; Gamma flies away; Big, Froggy, Knuckles and Chris escape on the X-Tornado. Once Tails gets back, he must stop a fired Eggman missile from detonating, and does so successfully. The people of Station Square cheer him on. Back at Chris' home, Amy finds out about Lily's siblings, then with great determination they head out to find them, and Chris locates the White Chaos Emerald.
31	"Gamma the Wanderer" ("Revenge Of The Robot") "Sasurai no Ganma" (さすらいのガンマ)	November 2, 2003	October 16, 2004
Fed up at the treatment he received under Eggman, Gamma declares his independence and reprograms the other E-100s except Beta, who is still aboard the Egg Carrier. Amy also heads there looking for Lily's family. Meanwhile, Sonic fights Eggman in his new Egg Viper. Amy and Lily flee from Zero, Decoe and Bocoe in the Egg Carrier and then witness Gamma and Beta battle and destroy each other. It is then revealed that Lily's brother and sister were the animals used to run Beta and Gamma.
32	"The Scream of Perfect Chaos" ("Flood Fight") "Pāfekuto Kaosu no Sakebi" (パーフェクトカオスの叫び)	November 9, 2003	October 23, 2004
Chris shows up with the White Chaos Emerald. Suddenly, Chaos arrives and attacks Chris. Sonic and Knuckles rescue Chris, but Chaos escapes with the Chaos Emerald. As it has all 7 Chaos Emeralds, Chaos turns into Perfect Chaos, and attacks Station Square, flooding the city. Tikal the Echidna, who came from the past, arrives to tell Sonic about Chaos. Perfect Chaos drains the Emeralds' power and discards them. Tikal believes the Emeralds can no longer be used. However, Tails, Amy, Cream, Knuckles, Chris, Big and Eggman find the Chaos Emeralds and give them to Sonic. The Emeralds gain their power back, and Tikal is shocked the Emeralds can be awaken by other feelings than hate and anger. Tails announces to Tikal the Emeralds' power were awoken through the friendship of Sonic and his friends, which is also the way Sonic can fully beat Perfect Chaos. Sonic transforms into Super Sonic, and defeats Perfect Chaos, but Chaos is still alive, in his first original form. However, Chaos' feelings are no longer anger, and is now happiness. A Chao Colony arrives and Tikal tells Chaos the truth, then Chaos and Tikal disappear together.
33	"The Mystery of Project Shadow" ("Project: Shadow") "Purojekuto Shadō no Nazo" (プロジェクトシャドウの謎)	November 16, 2003	October 30, 2004
While hacking into G.U.N.'s computers, Eggman comes across the journal of his grandfather, Professor Gerald Robotnik, and learns of Project Shadow, a mysterious plot that was rumoured to be so dangerous that the military attacked Gerald's home, the Space Colony ARK, and captured Gerald and imprisoned the result of Project Shadow, the Ultimate Lifeform, on Prison Island. Along with that, Eggman realizes that since his grandfather was living on Earth, he must be from their planet. Eggman and his sidekicks break into Prison Island to unlock the Ultimate Lifeform using the White Chaos Emerald and are in for quite a surprise. Meanwhile, Rouge and Topaz are looking for Eggman and take the Master Emerald. Knuckles tries to stop them, but he fails. Topaz finds the Blue Chaos Emerald and gives it to Rouge. Note: This is the first episode to use the plot of Sonic Adventure 2.
34	"Fugitive Sonic" ("Shadow Knows") "Tōbōsha Sonikku" (逃亡者ソニック)	November 23, 2003	November 6, 2004
A mysterious black hedgehog similar to Sonic robs a bank, stealing the Green Chaos Emerald. Sonic is framed for robbing it and G.U.N. forces are chasing him down. Sonic is shocked when they run into the real thief: a black hedgehog named Shadow the Hedgehog! Shadow is known as the Ultimate Lifeform, who was locked away 50 years ago, but then freed by Dr. Eggman. Sonic and Shadow battle, ending with Shadow making his escape when the police arrived, and Sonic being taken to Prison Island. Meanwhile, Shadow meets Eggman on the ARK and introduces him to the Eclipse Cannon, a powerful weapon that can destroy a planet. Shadow says it needs the Chaos Emeralds to be powered, and Eggman decides to use it to either conquer or destroy Earth. Rouge mysteriously appears, offering the Blue Chaos Emerald and her help to collect the remaining emeralds, but what are her real motives?
35	"Escape From Prison Island" ("Sonic's Big Break") "Purizun Airando Kara no Dasshutsu" (プリズンアイランドからの脱出)	November 30, 2003	November 13, 2004
Sonic is being held in a top security prison, Prison Island, thanks to Shadow and Eggman. Tails, Amy, Chris and Mr. Tanaka venture onto the island to save Sonic. Shadow, Eggman and Rouge venture onto Prison Island to retrieve three more Chaos Emeralds (Cyan, Purple and Red). Amy releases Sonic, who races off to find Shadow. Rouge finds three Emeralds but gets locked in a safe. Meanwhile, Chris is separated from the others and goes to find Sonic by himself. Shadow uses Chaos Control to get to Rouge, but Chris hitches a ride as well. Shadow sees that a figment of his imagination makes Chris appear like Maria while he is begging (a relation of Gerald Robotnik and Shadow's friend who died), and because of this, Shadow teleports them to the ARK. Prison Island explodes, but thankfully everyone escapes without harm.
36	"The Threat From Outer Space" ("Shadow World") "Uchū Kara no Kyōhaku" (宇宙からの脅迫)	December 7, 2003	November 20, 2004
Shadow, Rouge and Chris arrive in the ARK. Eggman starts to get the Eclipse Cannon ready to destroy the Earth! Eggman begins test and destroys the half of the Moon. In order to get to Eggman's base on Space Colony Ark, Sonic and co. must infiltrate his launch site. At the same time, Tails creates a fake Chaos Emerald out of his Yellow Emerald and joins the gang. Tails sees more people and tells them that the tornado only seats 4 people. Sonic spots a rocket and he, Amy, Tails, Knuckles and Tanaka fly to the ARK to save Chris, as Topaz keeps an eye on Cream while the others are gone.
37	"The Space Colony ARK Battle" ("Robotnik's Revenge") "Supēsu Koronī ĀKU no Tatakai" (スペースコロニーアークの戦い)	December 14, 2003	November 27, 2004
Sonic and co. arrive to stop Eggman from using the Eclipse Cannon to destroy the Earth. Tails gives Sonic a fake Yellow Chaos Emerald, thinking it will destroy the Cannon when placed in with the other Emeralds. Eggman captures Amy as ransom for Sonic giving him the Yellow Emerald. Sonic obliges, but Eggman can tell that it is a fake, and captures Sonic in an exploding capsule, shooting him out into space. Luckily, Sonic is able to Chaos Control back onto the ARK. While Sonic takes on Shadow, the others set out to find Eggman who now has all seven emeralds, and Knuckles takes on Rouge to get the Master Emerald back. When Eggman puts all seven Chaos Emeralds into the Cannon, a recording of Professor Gerald announces that the ARK will now crash into Earth, destroying it completely, as his revenge on all humanity for what they did to Maria.
38	"Maria's Wish, Everyone's Wish" ("Showdown in space") "Maria no Negai, Minna no Negai" (マリアの願い、みんなの願い)	December 21, 2003	December 4, 2004
As the Space Colony ARK heads for the Earth, the combatants put aside their differences to stop the descent. However, Shadow begs to differ, and refuses to help since he believes mankind deserves to die because of what they've done. Chris attempts to reason with Shadow, only to be knocked away several times. Finally, he finally realizes Maria's true wish and decides to help. He does so by fighting off the Bio-Lizard, a Project Shadow prototype, while Knuckles drains the Chaos Emeralds of their power by using the Master Emerald. At first it appeared as if the Bio-Lizard was defeated by Shadow, however, it uses Chaos Control to attach itself to the Colony ARK to become the Final Hazard which is also determined on pulling it toward Earth even faster. In order to stop it, Sonic and Shadow go into super-form. For a last second victory Shadow sees a vision of Maria, and takes off his Inhibitor Rings to gain all the power he needs. Both he and Sonic use Chaos Control to teleport the Space Colony out of the atmosphere and back into orbit. Shadow vanishes at the climax of their victory and is presumed dead. As the group leaves ARK, Sonic looks back at the window one last time and says goodbye to Shadow in his mind before catching up to the others.
39	"Chaotix Detective Agency" ("Defective Detectives") "Kaotikusu Tantai Jimusho" (カオティクス探偵事務所)	December 28, 2003	December 11, 2004
Three detectives named Vector the Crocodile, Espio the Chameleon, and Charmy Bee who have formed the Chaotix Detective Agency from Sonic's world arrive and appear to be looking for Cream. They introduce themselves to the TV audience (In the English dub, there is a video camera). Meanwhile, Sonic notices Eggman sitting alone with his eggmobile, he immediately investigates. Surprisingly, they wind up having a conversation about the moon being repaired and what the future would be if they stayed any longer in this world. (in the English dub, he talks about if there is a point of world domination, with Sonic still suspicious). The Chaotix confront Tails and Amy, and the person who hired the detectives appears; Cream's Mother, Vanilla the Rabbit. Cream hugs her as Sonic, Tails, Amy, Chris, Chuck, Ella, Tanaka and Chaotix talk. Eggman appears above saying that he did more than just repair the moon (In the English dub, he says that he will be back before he knows it). Deleted Scene: When the Chaotix find a DVD, they realize that they do not have a DVD player and have Espio steal one due to their lack of money.
40	"Eggman Corporation" ("Sunblock Solution") "Egguman Kabushiki-gaisha" (エッグマン株式会社)	January 4, 2004	December 18, 2004
When the sun is eclipsed during the New Year's celebration, Station Square faces a risk of panic and Eggman steps in to help. He claims that the Eggmoon has malfunctioned, and then provides a solution with his new Sunshine Balls. Eggman becomes the hero, but Sonic does not trust him and begins demolishing the towers that Eggman uses to power the balls. Then, in an ironic twist, Eggman takes over the show, naming it "Eggman X", and declaring Sonic the villain.
41	"We Can See the Light!!" ("Eggman for President") "Hikari wo Warera ni!!" (光をわれらに！！)	January 11, 2004	January 22, 2005
Everyone tries to stop Sonic's rampage in order to find out why he's doing it. Sonic reveals that the Eggmoon cannot possibly block the sunlight all the time, because the Earth is rotating, the Moon is rotating around the Earth, and the two are both revolving around the sun. If the Eggmoon had really stopped moving, the rotation would allow for sunlight most of the time; therefore, Eggman is lying. Eggman holds the President hostage, but is thwarted when Sonic and co. show up to save him. A "runaway quiz" begins to take place after the Eggmoon was destroyed, with each of the characters holding a sign with two choices on top, and arrows leading left and right on the bottom (the questions were changed in the English dub). When he answers the last question asked by Sonic: "Who is the main protagonist of this program?" (original)/"Who's the coolest guy around? Me or you?" (English dub) he replies with "I can't accept that! I am!" (original)/"Me!" (English dub), and winds up getting sent to jail.
42	"Amy's Love Escape Journey!?" ("A Date to Forget") "Emī Ai no Tōhikō!?" (エミー愛の逃避行！？)	January 18, 2004	January 29, 2005
Amy becomes angry and upset when Sonic misses their date, and goes out with Sam Speed instead. Bokkun, left to free Eggman from jail, activates an old robot named Emerl to aid him. Sonic is forced to take on Bokkun, while Amy and Sam battle one of Eggman's robots. Amy learns why Sonic likes to run so much, and they soon arrive at the beach. Sonic, who defeated Bokkun, shows up and Amy is about to hug him, but she winds up falling on her face. In the end, Cream and Cheese find Emerl in the garden.
43	"Huge Home Electronics Panic!" ("Mean Machines") "Kaden Dai Panikku!!" (家電大パニック！！)	January 25, 2004	February 5, 2005
As the Sonic craze spreads, people start trying to live like him, resulting in job-quitting. At the same time, Eggman, Decoe and Bocoe are repairing the machines. Eggman puts a chip on them which makes them crazy and evil to seek revenge on Sonic. While Sonic and his friends are attacked by the machines, Emerl begins to copy his Spindash. Water sprays and the machines get damaged. The others arrive and Sonic finds out Eggman is to blame. The machines dry the water, and Sonic runs to city to rescue people from machines, while Tails, Amy and Nelson go to get water supplies. Meanwhile, Bokkun rescues Eggman, Decoe and Bocoe. Sonic spots Knuckles battling with the machines. Tails, Amy and Nelson repair the water, but the machines are damaged the dam. Sonic and Knuckles get too tired, but their friends save the day.
44	"The Ridiculous Epic Spy Battle" ("Sewer Search") "Okashi na Okashi na Supai Daisakusen" (おかしなおかしなスパイ大作戦)	February 1, 2004	February 12, 2005
With Eggman on the loose, everyone is searching for him. Mr. Stuart investigates his plan. Cream, Chris, Helen, Danny, Frances and Emerl join Mr. Stuart and goes after Eggman. It is revealed Eggman has a hideout in the sewers. Cream, Chris, Helen, Danny, Frances, Mr. Stuart and Emerl chase Eggman, but they are captured. Meanwhile, Chuck tells Sonic that Cream, Chris and Emerl are gone and Sonic goes to find them. Mr. Stuart frees himself, Cream, Chris, Helen, Danny, Frances and Emerl and try to find the exit. Cream, Chris, Helen, Danny, Frances, Mr. Stuart and Emerl are attacked by Eggman's Egg Spider. Sonic, Rouge and Topaz arrive to save them. Emerl begins copy Rouge's kick. Emerl frees everyone and they escape from sewers.
45	"Sonic Battle Opens!!" ("Prize Fights") "Sonikku Batoru Kaisai!!" (ソニックバトル開催！！)	February 8, 2004	February 19, 2005
To lure Eggman into the open, the President throws a tournament with the Red Chaos Emerald as the prize. Sonic and many of his allies compete, as do a few of Eggman's henchmen. In the final round Sonic and Amy face off but Amy refuses to fight him and thinks that Sonic will never fight her by saying that he cares, which embarrasses Sonic. However, Eggman shows up and Sonic saves Amy from being blown to bits, then chases after Eggman. Amy is declared the winner.
46	"Sonic Battle Finale!!" ("A Wild Win") "Sonikku Batoru Kesshō!!" (ソニックバトル決勝！！)	February 15, 2004	February 26, 2005
The final fight pits Knuckles against Emerl against each other and Emerl succeeds, but upon receiving the Chaos Emerald, Emerl turns berserk and wrecks the city and beats up Sonic, Knuckles, Rouge, Amy and Tails, but Cream and Cheese manage to defeat Emerl, who is unable to copy their battle data due to both attacking at once. After being knocked into the ocean, Emerl recalls one last ability (Cream the rabbit in tears) and gains the ability to physically cry oil before exploding. As for the Chaos Emerald, it teleports to another location.
47	"Big Decisive Battle on Latitude 0!!" ("Map Of Mayhem") "Ido Zero Dai Kessen!!" (緯度０大決戦！！)	February 22, 2004	March 5, 2005
Dr. Eggman kidnaps a group of G.U.N. soldiers, including Topaz, and steals a map of the lost continent of Murasia. Pursuing him, Sonic and the gang find him planning to activate a hotspot located beneath an island that is the last remnant of Murasia. Engaging Eggman's Giant-Makan warship, they are joined by the Egg Fort, which has been recovered and refurbished into the G.U.N. fort. The G.U.N. fort sets out to destroy Eggman's vessel, not caring for the prisoners aboard. In desperation, Eggman tries to fire the Giant-Makan's main weapon, driving off the G.U.N. forces. Sonic and Knuckles work together and destroy Eggman's ship. Eggman, his allies, and Sonic's friends then land on the island.
48	"Sonic Versus the Monster from Underground" ("The Volcanic Venture") "Sonikku tai Chiteikaijū" (ソニック対地底怪獣)	February 29, 2004	March 12, 2005
Traveling around on the island, Eggman plans to set off the hotspot with an explosion. While Sonic, Knuckles, and Rouge investigate the subterranean landscape of the island, the others are trying to locate Dr. Eggman. Unwittingly, the intruders awaken a giant Mogera-esque robot that attacks them. Over the course of a pitched battle, Decoe and Bocoe reject Dr. Eggman and try to help, but are sent flying. Sonic then throws Eggman's explosive into the robot, causing it to explode. The island begins to sink, and everyone escapes. Decoe and Bocoe then emerge, having been rebuilt by Tails and Chuck, and denounce Dr. Eggman.
49	"The Day the World Stood Still" ("Beginning of the End") "Sekai ga Seishisuru Hi" (世界が静止する日)	March 7, 2004	March 12, 2005
Everyone is having freedom from their jobs; Decoe and Bocoe are now working for the Thorndykes, and Lindsey and Nelson visit Chris and they decided to spend time with Chris if the freedom never ends. Eggman is totally upset for Decoe and Bocoe's betrayal. During a barbecue, Chuck gets a phone call from the President and gets permission to do Project Homebound. That night Sam Speed is chasing a crook down the highway and thinks that freedom can break the speed limited and thought about Sonic thinking that they would become buddies. The man's car fells down the highway and gets destroyed and Sonic saves the man and races with Sam once more. Meanwhile Chris was doing homework about his dream of the future to keep Sonic forever until he hears a splash from his swimming pool and went outside to have a look and see if it is Sonic but it was a small kitten. Later, a strange visitor shows up explaining that it is discovered that Sonic's world and theirs were once one and at some point in the past a catastrophic event caused the worlds to split and join parallel universes running on their own timeline. The two worlds are rejoining and the timelines will cancel each other out causing time to stop and the only way to stop this is to send Sonic and the rest back home. Chris believes this is one of Dr. Eggman's tricks, so he runs away and asks Decoe and Bocoe to take him to Eggman, but they do not know where Eggman is. Bokkun arrives and takes them to Eggman. When Eggman tells him he did not do it, Chris goes back home. Tails tells Chuck they have find two missing Chaos Emeralds and decides to build the teleport gate. The episode ends with Sonic hearing Chris' voice and finding the Red Chaos Emerald.
50	"Morning of Farewells" ("Running Out Of Time") "Wakare no Asa" (別れの朝)	March 14, 2004	March 19, 2005
On the morning news The President reports about the merging planets and spending the last day with Sonic and the others until they go home. Outside Chris meets Sonic at the swimming pool who asks if he would like to go for a run with him. Tails and Chuck are working on a machine to initiate Chaos Control to send Sonic and the rest back. At school Chris and the others know what is happening until an army of flying robots start invading Station Square. An army colonel has, against the president's will, sent the robots after Dr. Eggman. Dr. Eggman is now under attack, when Sonic arrived and attempted to save Eggman. Eggman handles the robots himself with his flying fortress, and gives Sonic a box containing the last part for the Chaos Control machine. Meanwhile Rouge, Knuckles and Topaz went to rescue the President from an army of agents. Sonic went back to the lab and gives the last piece of the machine to Tails and Chuck. That evening, Chris got ready to say goodbye but he feels sad. Everyone had left the mansion and had gone to the portal. Tails and Chuck start up the portal but it stopped working. Sonic gives them the Emerald he found and they start it back up. Eggman, Decoe, Bocoe, and Bokkun in the fortress, along with all the other creatures that came through from Sonic's world, go through the portal, but it stopped working again. Tails did not want to give up and Chuck says that they have to adjust a few things. Just then, Sam arrives and before he gets out of his racing car he drives away quickly, wondering if he could step down since he no longer has any real challengers. Everyone had a little laugh but Chris did not. Tails works on the portal and manages to get energy from Space Colony ARK and starts it back up. Everybody said goodbye as Chris feels worried. Meanwhile Scarlet and Mr. Stewert looked at the energy and Scarlet wonders what Mr. Stewert is and Mr. Stewert says that she will have to keep investigating. Chuck tells everyone that they cannot keep the gate open long and demands them to leave before a power failure occurs. Amy, Cream, Cheese, Vanilla, Tails, Rouge, and Knuckles leave now, and as Sonic is about to leave, Chris says goodbye to him(But his mind does not think so). Just as Sonic is about to step through the portal, Chris runs over and shuts it down.
51	"Chris' Long Journey" ("Friends 'till The End") "Kurisu no Nagai Tabi" (クリスの長い旅)	March 21, 2004	March 19, 2005
After stopping him from going home Chris runs away with Sonic and takes him farther and farther through the woods in the dark, and Sonic seems apathetic about being kidnapped by his friend. Mr. Tanaka and Topaz tried looking in the woods but could not find them so Topaz says that the police have to set up a search to find them quickly and Chuck says that they do not have much time to cause chaos control and send Sonic back to his world before the two worlds merge together to cause time to stop. The next morning Chris and Sonic walk through Station Square until they find a bike and rode as they left the city and headed to the desert. They stopped at a cafe to have something to eat until the news came reporting about Chris and Sonic who have run away with a video of Lindsey upset and wants Chris to come back. Chris and Sonic left the cafe and saw helicopters who are Nelson's so Sonic came to a truck to give him and Chris a lift and the bike ended up in the desert while Sonic and Chris were in the truck and escaped from the desert with the helicopters searching. Sonic and Chris stopped at a forest and then a railway track that went passed by once. Chris says that he will forget about him someday, Sonic always forgets but it would be impossible to forget about him. Soon Sonic and Chris were feeding some birds and were thinking that they will harder to find even Chris' parents and they set off. They came up a waterfall and Sonic gave Chris a hand. Soon they walked across another forest. Chris runs and trip over a stone and Sonic asks him for a hand but Chris can do it himself and so they stop to see a beautiful lake. After failing to find Chris with his helicopter fleet, Nelson and Lindsey are ready to try to buy Chris back with whatever he wants when fortunately Chuck persuades them they need to find Chris themselves, personally, by looking somewhere Chris would want them to find him. Eventually Chris takes Sonic to a lakeside cabin that Chris and his family used to go to when he was little, but stopped when his parents started becoming busier and busier. They make a campfire and Sonic tells Chris he will stay if Chris wants him to. Chris realizes Sonic has to go and finally admits he was lonely before Sonic came, and was afraid he would be lonely again. Sonic expresses hope that he will see Chris again someday. So Sonic returned to his own dimension. Soon after, Lindsey and Nelson reach the cabin, and find Chris on the dock alone, and glad to see them.
52	"Memories of the Wind" ("A New Start") "Kaze no Omoide" (風の思い出)	March 28, 2004	March 26, 2005
Sonic's friends—and enemies—have all returned home to their own world, but Sonic himself has been conspicuously absent for a week. With his nemesis gone, Dr. Eggman engages in increasingly ridiculous, but harmless, displays of power, hoping to draw him out. Amy, meanwhile, has considered Cream and Vanilla's proposal that she might live with them. Just as she is about to explain why she will not agree to it, Eggman arrives, blaring his plans for world domination over the entire suburb. When Amy attacks with her hammer, he only rubs in the fact that Sonic has not returned to her. As Amy unleashes her fury on Eggman, Knuckles and Rouge also sit together, each missing Sonic and razzing the other about it until it escalates into a full-scale battle. Drawn out by the noise, Tails flies the Tornado to the scene. He attacks Eggman with massive firepower, aided by a transformation mode that Chuck had installed in secret. Eggman responds with an incredibly persistent tracking missile that Tails cannot shake off. His display finished, Eggman orders Decoe and Bocoe to press the self-destruct button on the missile before it hits Tails, and when they confess that there is not one, he becomes distraught. It seems to be all over for Tails, until a flash of light from the moon comes closer and turns out to be Super Sonic. Sonic blows up the battleship, but rather than being frustrated, Eggman is happy that their old game is on again. Knuckles and Rouge see Sonic flying overhead, and their fight also turns from angry to playful. When Amy sees him, she runs after him until he lands at her house. In tears, she confesses that she had just made the decision to wait for him forever, and begs him to tell her that he loves her. In response, Sonic hands her a rose and gives her an inaudible answer and she embraces him. (The English dub changes this scene significantly: Amy demands that he never leave her again, to which he audibly replies that he never will.) Six years later in his own world, Chris is a skilled scientist himself. He is just putting the finishing touches on the dimensional transporter, in an attempt to cross to Sonic's world. Reminiscing with his classmates, he recalls the last night Sonic spent in his world. Sonic had the seven Chaos Emeralds with him throughout their trip to the villa, and therefore could go home whenever he wanted to... But he took Chris on one last run around the lake before using Chaos Control to go home.

Series 2/Season 3

#	Translated original title (English dub title) Original title (Japanese)	Original airdate (US)
53	"The Messenger from a Meteor Shower" ("A Cosmic Call") "Ryūsei Ame no Shisha" (流星雨の使者)	September 10, 2005
Super Sonic is fighting against a mysterious robot. Super Sonic is unable to defeat him and he sends the Chaos Emeralds away to avoid his opponent to take them from him. Without the Emeralds, Sonic loses his energy and he falls to his planet. Another robot (known as a Metarex) follows him. Back on the planet, Tails, Amy, Cream and Cheese are watching a meteor shower, when a ship almost crashes into them. They follow the ship and find a strange girl lying unconscious by the ship. Meanwhile in Eggman's base, Sonic wakes up and Eggman tell Sonic how he found him on the beach, and that he has waited nearly a week to find out what happens. Rouge the Bat watches from above and Sonic leaves Eggman's base. In Cream's house, after introducing themselves, everyone is surprised by the arriving Metarex who starts destroying the forest with laser beams. The last Metarex was able to finish his duty: which was to remove the "planet egg". A strange girl named Cosmo explains that the planet egg is the lifeforce of their world. Sonic, Tails, and Knuckles make a last effort to save the Planet Egg, but the Meterex escapes. Cosmo tells Sonic that he is the final hope to save the galaxy. At the same moment, Chris (who is now 18) completes his new machine that will transport him to Sonic's world. It works, but Chris arrives in his 12-year-old body. The reason this happens is because a year on Chris' world is only a month on Sonic's, meaning that it has only been 6 months since Sonic and Chris last saw each other.
54	"The Spaceship Blue Typhoon" ("Cosmic Crisis") "Uchūsen Burū Taifūn-gō" (宇宙船ブルータイフーン号)	September 17, 2005
Cosmo explains the Metarex goals and the consequences of the planet egg's removal. Cosmo also admits that she's the only survivor from her group, which was eliminated by the Metarex. Knuckles does not trust Cosmo. Everybody (except for Knuckles, who's suspicious of her) agrees that the Metarex must be stopped and they decide to go into space to destroy the Metarex and to find the lost Chaos Emeralds. Luckily for them, Tails has just finished to build his new invention: a big flying fortress called the Blue Typhoon. His new ship has to be powered by the Chaos Emeralds. Chris thinks that they could use the Master Emerald. Knuckles initially disagrees, but with some female persuasion, (getting attacked by Amy, Cosmo, and Cream,) he finally agrees. At the same time, another Metarex is sent to the planet in order to destroy Sonic and the Blue Typhoon. A fight engages between the Metarex, Sonic and Knuckles. With the help of the Typhoon's primary weapon, the Sonic Driver (Sonic Power Cannon in the English dub), the Metarex is destroyed. The Blue Typhoon takes off, but it is followed by Dr. Eggman and Rouge.
55	"The Water Planet Hydo" ("H2Whoa") "Mizu no Wakusei Haidō" (水の惑星ハイドー)	September 24, 2005
At Chris' world, everyone is surprised that Chris goes to Sonic's world alone. Everyone tries to get him back, but it is too risky. At the same moment, The Blue Typhoon is now on its way to a new adventure. Knuckles thinks that a Chaos Emerald is nearby due to the Master Emerald's reactions. A planet is located and according to Sonic's guidebook, this is a dry planet. However, they find out that it is covered by water. Accidentally separated of the others, Chris and Sonic arrive to a Metarex base, where several Metarex await them. The fight is engaged, but Chris, wanting to help his friend, is unable to punch a Metarex without hurting himself. Eventually, Sonic is captured and Chris is able to escape. Chris gets depressed and he's having a memories of his 6 years: He was studying with Danny, he was taught flying by Chuck, taught karate by Tanaka, he was working on the restaurant with Frances and he was on a date with Helen. Chris wants to help. Finally, Amy and Tails succeed to rescue Sonic with the X-Tornado, but Metarex attack the plane and by accident, Sonic falls straight toward the water. Chris arrives with another plane and saves Sonic with his own invention: hover shoes. The Metarex are finally defeated, the water retires from the planet and the Blue Chaos Emerald is found.
56	"Dr. Eggman Joins the War!" ("An Enemy In Need") "Dokutā Egguman Sansen!" (Ｄｒ．エッグマン参戦！)	October 1, 2005
After saving the planet in the former episode, Sonic and his friends are thanked in a feast. Dr. Eggman is watching the scene and he thinks about his next scheme to take away the Chaos Emerald. Bokkun suggests a plan to Eggman, but the evil doctor does not notice that it has been elaborated by Rouge, who made her way to the Egg Carrier. Eggman soon finds Knuckles and he tries to persuade him that he did not want to be a bad person anymore, and he wishes to leave the planet by using a Chaos Emerald. Knuckles believes him and he finds the others in order to take the Emerald they just found and to give it to Eggman. Sonic disagrees and both of them engage in a fight. Taking advantage of the situation, Eggman almost takes the Emerald, but he is stopped by Amy and the others. This gives a Chance for Rouge to steal the Chaos Emerald, But at the same moment, a frog-shaped Metarex rises from the ground and it grabs the Emerald. Eggman let Cosmo go and he engages a fight against the Metarex. However, Eggman is defeated. It is Sonic's turn to fight the Metarex and, with the help of the Sonic Power Cannon and a Chris' trick, the blue hedgehog is victorious. The episode ends as Knuckles apologizes for being fooled by Eggman. Error: When Amy explains how Eggman tricked Knuckles, his eyes are green for a moment.
57	"The Battle on the Ice Palace" ("A Chilling Discovery") "Aisu Paresu no Tatakai" (アイスパレスの戦い)	October 8, 2005
With the help of Chris' new program, the Blue Typhoon spots a Chaos Emerald on planet Freezy. The Blue Typhoon approaches planet Freezy, but it is attacked by a Metarex and it crashes on the planet. Sonic, Chris, Knuckles and Cosmo decide to go get the Chaos Emerald with the X-Tornado because Blue Typhoon is damaged. Rouge is also on her way for getting the emerald before Sonic. Everybody has to fight Metarex before reaching an ice palace, where the emerald is supposed to be located. Sonic's group find it, but it is sealed in a solid ice block. A more powerful Metarex appears and gets power from the emerald to become even stronger. A fight engages and Cosmo finds the way to defeat it with a laser beam. The laser from Blue Typhoon defeats Metarex. Planet Egg gets trashed into planet and the snow disappears. Knuckles finds the Chaos Emerald but before he gets it, Rouge steals it. However, Tails discovers that the emerald was a fake one.
58	"The Maidens' Jungle Trap" ("Desperately Seeking Sonic") "Otome no Janguru Torappu" (乙女のジャングルトラップ)	October 15, 2005
The Blue Typhoon detects two Metarex who just stole a Planet Egg on a jungle planet. Sonic destroys the biggest Metarex with the Power Cannon, but he is launched too hard and he falls straight to the planet. He crashes right onto Dr. Eggman, who is already on the planet, and Sonic takes the Green Chaos Emerald that the evil doctor has just discovered. Having landed on the planet, Tails and Knuckles get aboard the X-Tornado in order to find Sonic, leaving Amy behind. Amy desperately wants to find Sonic by herself and she enters into the jungle. She is accompanied by Cosmo, who wants to find the Planet Egg, and Cream and Cheese, who do not want to be left alone. Inside the jungle, Amy, Cosmo, Cream and Cheese struggle to find Sonic and the Planet Egg, but they are captured twice by the small Metarex who survived the previous fight. However, they escape and are able to take possession of the Planet Egg. Sonic is still running in the jungle with the Chaos Emerald in his hand and he is found by Tails and Knuckles. Dr. Eggman arrives and he steals the emerald from Sonic. Sonic and Knuckles prepare to fight, but the girl group and the Metarex appear. Eggman captures everybody (even the Metarex). The Planet Egg begins reacting and huge creepers wraps everyone. Sonic is able to free himself and with a little help from Tails and Chris, he defeats Eggman. The episode ends with Cosmo learning about teamwork.
59	"Go into Space, Chaotix" ("Galactic Gumshoes") "Kaotikusu, Uchū e Iku" (カオティクス、宇宙へ行く)	October 22, 2005
Chris' grandfather, Chuck, finds a way to teleport material objects to Sonic's world. The stuff is discovered by Vanilla and she asks the Chaotix Detective Agency to deliver it to Chris. She's also worried about her daughter Cream and she asks them to check on her. Vector accepts, but Espio tells him that they do not have any space ship. However, Chuck also sends a space ship to Sonic's planet and the Chaotix are on their way. Aboard the Blue Typhoon, Sonic and Knuckles are playing chess. Knuckles takes time before moving a piece, and Sonic decides to take a quick walk outside the ship. Accidentally, Sonic slips from the ship and drifts into outer space, and Knuckles leaves the Typhoon to recover him. Inside the ship, Tails points out that another ship is approaching and everyone is convinced that it is a Metarex ship. The Chaotix are beaten up one by one when they try to get in. Afterwards, they flee, but Tails pursues them in the X-Tornado. He discovers a little house on the ship and realizes it is not an enemy ship. Chris and the others apologize and everybody brings in the stuff sent by Chris' family. Vector, thinking that Vanilla actually wanted Cream back, decide to leave the Blue Typhoon, taking Cream with them. Vector kidnaps Cream, but Cosmo sneaks along with them. Luckily, Sonic is back and he fights Vector in order to take the girls back with him. Finally, an agreement is settled and Cream gets back to the Blue Typhoon. The episode closes in Eggman's Crimson Egg, where Rouge finds a strange capsule in a secret room.
60	"Shadow Rebirth" ("Trick Sand") "Shadō Ribāsu" (シャドウ・リバース)	October 29, 2005
Rouge discovers that Shadow is currently hibernating inside a capsule on Eggman's ship. The Blue Typhoon follows the Chaos Emerald's signal to a dark, abandoned planet. Sonic, Amy and Knuckles search inside an old castle, while Chris and Cosmo look inside an ancient colony. Sonic's group quickly notices that the castle is a trap. In fact, it is an illusion created by a Metarex. Chris, who's in the Hyper Tornado, saves Sonic's group from the Metarex's clutches. This Metarex suddenly turns the castle into a sandtrap. Sonic tries to counter-attack, but instead is electrified by the boss Metarex. Chris tries to save Sonic, but the Hyper Tornado gets damaged by the attack. At the same moment, in the Crimson Egg, Shadow awakens and he teleports himself to the fight place. He easily defeats the Metarex, saves Chris, and he shows his presence to everybody. He disappears with the Purple and Red Chaos Emeralds.
61	"Metarex Battleship Attack!" ("Ship of Doom") "Metarekkusu Senkan Shūrai!" (メタレックス戦艦襲来！)	November 5, 2005
The show opens with a fight involving a huge Metarex named Evilship/Scarship and an armada of smaller ships. The Metarex destroys every ship and he's assigned to a new mission: to destroy Sonic and Dr. Eggman. Aboard the Crimson Egg, Dr. Eggman finds out that he is approaching and the battle engages. Eggman sends Shadow to destroy him, but Shadow is unable to do the job due to his lack of energy. Rouge flees from the Crimson Egg, just before Evilship/Scarship sends a missile and seems to have destroyed it. Rouge informs the Blue Typhoon's crew of the situation and sends them images from the battle. Cosmo recognizes it, it is the Metarex who destroyed her group's ship. Evilship/Scarship decide to destroy the Blue Typhoon by crashing into it. The Typhoon will not be able to get out of its way in time, but Shadow appears from nowhere and takes him away. It appears that Eggman was able to escape from him. However, he will not ever surrender and it is about to self-destruct. Shadow is able to freeze time around it and Sonic defeats it with the Cannon.
62	"Secret of the Underground Valley" ("An Underground Odyssey") "Chika Keikoku no Himitsu" (地下渓谷の秘密)	November 12, 2005
The show opens with a sequence inside Cosmo's ship and ends when Evilship/Scarship (see previous episode) destroys it, leaving Cosmo alone. Then, we find out the Blue Typhoon's crew is on a new planet. It seems that there's a Chaos Emerald nearby. Tails, Knuckles and Cosmo follow the emerald's track to an abandoned city. Knuckles discovers a deep gorge. Lower, there's a cave. Tails and Cosmo enter, but Cosmo accidentally pushes a button which launches an avalanche and seals them inside the cave. Tails still receives the emerald's signal and he and Cosmo pursue their searches. Inside the cave, Tails and Cosmo discover a big factory full of Metarex. They enter unnoticed and they find the Chaos Emerald inside a manufacturing plant of fake emeralds. They are found out by the Metarex, but they are able to escape with the White Chaos Emerald.
63	"Space Fortress Metal Plant" ("Station Break-in") "Uchū Yōsai Metaru Puranto" (宇宙要塞メタルプラント)	November 19, 2005
Eggman discovers that the last two Chaos Emeralds (Cyan and Yellow) are located inside a huge Metarex fortress. The Crimson Egg and the Blue Typhoon arrive on location at the same moment. Eggman suggests Sonic to put their efforts together in order to enter inside the fortress. His plan: a little group will enter first and disconnect the fortress' security system, so the other ones could penetrate. Eggman sends Shadow and Rouge while Chris volunteers to accompany them. They enter with the help of Chaos Control. Chris finds the control room and they succeed in their job. Sonic and Knuckles penetrate in the fortress aboard the X-Tornado, Amy and Cosmo follow them and Eggman, Bocoe and Decoe are right behind. Sonic finds the emeralds. The only thing: he is welcomed by an entire army of Metarex, led by Dark Oak, the Metarex leader, and the battle is about to begin.
64	"Clash! Sonic vs Shadow" ("A Metarex Melee") "Gekitotsu! Sonikku bāsasu Shadō" (激突！ソニックｖｓシャドウ)	November 26, 2005
The fight between Sonic and Dark Oak starts. Sonic directly attacks Dark Oak, but he instantly disappears: it was a hologram. Outside the fortress, a Metarex armada, led by Red Pine, is approaching. Surprisingly, the Red Pine army begins to attack their own fortress, while there still are Metarex inside. Shadow, Rouge and Chris are transported, via Chaos Control, inside the Egg Carrier. Chris finds a way to steal the emeralds found by Eggman and flees away by using one of Eggman's mini-ships. Shadow follows him and he stops him. Rouge grabs him and she wants Chaos Emeralds. Chris claims he does not have them and Rouge drops him. Chris falls to his doom, but he's rescued by Knuckles, who's having trouble with piloting the X-Tornado. Chris and Knuckles, followed by Shadow and Rouge go to save Sonic, Amy and Cosmo. The seven Chaos Emeralds are put together, transforming Sonic and Shadow into their super forms. Super Sonic and Super Shadow engage into a fight inside the fortress. At the same moment, a gravitational field is activated inside the fortress and it starts to destroy itself from the inside. The Metarex armada is destroyed, Super Shadow sees the Crimson Egg fly down to the center of the gravity field and jumps in and brings it back to space via Chaos Control, while the Blue Typhoon escapes with the power of the Master Emerald.
65	"The Chaotix's Big Shocking Love-Love Mission" ("Mission: Match-Up") "Kaotikusu Dengeki Rabu-Rabu Dai Sakusen" (カオティクス電撃ラブラブ大作戦)	December 3, 2005
The Blue Typhoon encounters the Chaotix ship. Vector notices the growing relationship between Tails and Cosmo. In order to thank Tails for fixing his ship, Vector decides to help him winning Cosmo's heart. At the same time, Tails unintentionally discovers Cosmo's surprise: she plans to throw a party on the ship. After finishing the preparations, the Chaotix go get everybody to the party room when they cross Knuckles' path. Knuckles was used against his will in one of Vector's plans and he decides to take his revenge. They end up in the party room and they ruin everything. Arriving on the scene, Tails and Cosmo are disappointed, but Sonic says it is no problem and that they will put everything back. He also thanks Cosmo for her party idea. Tails tries to tell Cosmo how he feels, but is too embarrassed, and the episode ends with Cosmo and Tails watching the stars outside in space.
66	"Crossing the Galaxy Corridor!" ("Clash in the Cloister") "Ginga Kairō wo Watare!" (銀河回廊をわたれ！)	February 4, 2006
The Blue Typhoon is pulled into the Intergalactic Cloister, a strange region of space. Eager to do battle, Metarex Commander Yellow Zelkova launches an attack on the Blue Typhoon. Sonic and Knuckles team up to fight him, finding that Zelkova is too powerful for them. However, they then trick him into freeing the Blue Typhoon from a formation of space stalactites, and put him in line with the Sonic Driver/Sonic Power Cannon. They fire, and Zelkova is thrown back, but not destroyed. They then escape as he swears vengeance.
67	"Black Trap" ("Teasing Time") "Burakku Torappu" (ブラック・トラップ)	February 11, 2006
Sonic and friends come across a barren planet with 500 Chaos Emerald signals coming from it. Black Narcissus is inside, and sends a message to the Typhoon, a message that only Cosmo can understand. He then sets off fireworks, allowing Cosmo to escape to the planet undetected. Unexpectedly, Chris follows, but Narcissus captures both him and Cosmo. When Chris tries to escape with Cosmo, Chris is attacked and stabbed by Black Narcissus. Meanwhile, Sonic discovers their disappearance and comes to rescue them, and upon seeing Chris injured and Cosmo terrified, he enrages and becomes a darker, more violent version of Super Sonic thanks to the Metarex' fake Chaos Emeralds' negative energy, dubbed Dark Sonic. Dark Sonic then proceeds to destroy two Metarex robots Narcissus had prepared just for him for an "experiment" (Gold for strength and silver for speed). Suddenly, Eggman appears and has Decoe and Bocoe hold Narcissus down while Bokkun kicks him, dealing some damage. Chris and Cosmo are saved by Shadow while Rouge destroys the machine that makes the fake Chaos Emeralds. Sonic returns to normal. Sonic, Chris and Cosmo are reunited with the others and Eggman asks Black Narcissus he cannot go to Metarex team as The Blue Typhoon leaves the planet. Note: This is the only time Dark Sonic appears.
68	"On a Destroyed Planet" ("A Revolutionary Tale") "Kowa Reta Hoshi no Ue de" (こわれた星の上で)	February 18, 2006
As the Crimson Egg makes its way through an asteroid field, it happens upon a battle between Pale Bay Leaf's forces and a group of humans. Eggman sends Shadow to destroy the Metarex ships, and Pale Bay Leaf retreats. The humans live on a nearby planet that is shattered and barren from having lost its Planet Egg. Their leader, Molly, compares Shadow to a legendary hero, but Shadow denies being a hero. Eggman's goal of collecting the Chaos Emerald on the planet is at odds with the humans' hopes; they have been fighting the Metarex for generations, and Eggman's help could bring their struggle to an end. When Molly, Shadow, and Rouge set out for a nearby mineral mine to get the Chaos Emerald, Leon, another member of the resistance, asks Molly to bring back a disc from the mine. They find the Emerald, but the locker allegedly containing the disc is booby-trapped. As soon as they escape, the Metarex arrive; they have told Leon that they will spare his planet if he hands over Eggman. Indeed, Molly is the last human left who still believes in defending her home planet. This affects Shadow and Rouge deeply, and they try to convince her to come away with them, but she lacks the mental fortitude to carry her dream all alone. She attacks the Metarex herself, and dies when they return fire (This is cut in the English dub). In response, Shadow removes his limiters and completely annihilates Pale Bay Leaf's fleet (though Pale Bay Leaf himself survives). Later, standing over Molly's grave, Shadow notes that Molly was not quite like Maria; Molly was clinging to the past, while Maria was hopeful for the future. Note: This is the only episode that does not have Sonic, Knuckles, Tails, Amy or Cosmo.
69	"Please Marmolin!" ("The Planet of Misfortune") "Onegai Marumorin!" (お願いマルモリン！)	February 25, 2006
At Chris' world, Danny, Frances and Helen try to unlock a password to make the teleport gate activate, but it does not work because only Chris can make it work. In the meantime, Sonic and the others find a meteor in space while searching for the Chaos Emeralds. Tails pulls it in, and they find it to actually be a space ship. Inside, small Chao-like creatures called Marmolians are discovered and it is revealed that they have the blue Chaos Emerald. The Marmolians and Sonic go back to their home planet, the Planet Marmolim, and Sonic destroys a diseased part of the planet that encased the Planet Egg. Amy thinks they have magic on the planet, so she tries to put a love spell on Sonic. However, it ends up backfiring, and instead works on Tails and Cosmo at the end of the episode, leading to the two embracing while watching the moon. This episode basically confirms Tails and Cosmo's relationship, much to the dismay of Amy.
70	"The Eggman Fleet Appears!" ("Terror on the Typhoon") "Egguman Kantai Arawaru!" (エッグマン艦隊現る！)	March 4, 2006
While travelling in an energy storm, the Blue Typhoon comes under attack from the Metarex fleet, led by the three surviving commanders and Eggman. Sonic attempts to attack from the Sonic Driver/Sonic Power Cannon, but Eggman deploys a shield that not only repulses Sonic's attack, but causes an overload explosion that puts Knuckles out of commission. With Sonic and Knuckles both out cold, Tails assumes command reluctantly until Cosmo boosts her confidence. Coming up with a plan, Tails pilots the Blue Typhoon towards a black hole in the storm. Sonic and Knuckles recover long enough to deploy the Sonic Driver/Sonic Power Cannon, reversing the black hole and allowing the Blue Typhoon to escape. Visiting the medical bay, Tails is praised by the injured Sonic and Knuckles.
71	"Cafe Chaotix" ("Hedgehog Hunt") "Kafe Kaotikusu" (カフェ・カオティクス)	March 11, 2006
Following their battle with the Metarex fleet, Sonic and the gang are stranded on an alien planet with the Chaotix, who are running a cafe to pay for parts to their own ship. Eggman arrives looking for Sonic and the others, while Pale Bay Leaf waits in orbit to shoot the Typhoon down. Helping out Sonic and the gang, the Chaotix provide parts for their ship. However, Eggman provides the real assistance when he disguises the Crimson Egg as the Blue Typhoon and takes the full force of the Metarex attack. Pale Bay Leaf moves off, and no ambush awaits the real Typhoon once it takes off. Deleted scene: Dark Oak introduces four Metarex commanders (including Eggman). Eggman attempts to appease the Metarex by helping them to eliminate Sonic and the gang, but what is his real goal?
72	"The True Form of the Metarex!?" ("Zelkova Strikes Back") "Metarekkusu no Shōtai!?" (メタレックスの正体！？)	March 18, 2006
The Blue Typhoon arrives at a planet, but Yellow Zelkova attacks it. He is shown equipped with a special energy shield built by Eggman. Sonic attempts to stop him, but is unable to break through the shield. Picking up where they left off, Zelkova and Knuckles get into a fierce battle, during which Knuckles smashes Zelkova's knee and breaks the spikes on one of his gloves. Using a cable from the Blue Typhoon, Sonic and the others channel lightning to overload Zelkova's shield. Zelkova's mechanical outer body is destroyed, revealing his flesh form beneath. Zelkova attacks, but is knocked into a nearby lava pit by Knuckles. Knuckles then tries to take Yellow Zelkova out of a lava pit, but ultimately fails and Yellow Zelkova dies in the process (This is cut in the English dub). Pale Bay Leaf informs Eggman of Zelkova's demise, mocking the failure of his shield. meanwhile, Shadow and Rouge find a fake Chaos Emerald at the top of the tree, but they hear groaning from its base. They find Leon (from the Resistance in Episode 68) being consumed by the tree, saying that the Metarex betrayed them. He also gives Shadow a memory chip and says it is not too late to destroy them.
73	"Assassin Shadow!" ("The Cosmo Conspiracy") "Asantsu-sha Shadō!" (暗殺者シャドウ！)	April 1, 2006
The episode begins with Sonic and his friends all getting ready for a rest. Tails tells Chris to go to bed whilst he tries to fix the security mainframe. The outline of Shadow is seen running down a corridor towards Cosmo's room. The security system comes on just in time to reveal Shadow's presence. Chris arrives on the scene to have Shadow fire a Chaos Spear at him. At the last moment, Sonic rescues Chris and takes the blow. Before Shadow gets a chance to attack Cosmo, Sonic gets back up and gets into a scuffle with him. Sonic gets Tails to run away with Cosmo. As they get outta there, Sonic gets knocked to the ground by Shadow and passes out. Amy and Cream take the injured Sonic and Chris to the hospital room, so they could be recovered faster. Tails realizes that Shadow has the technology to hack the security camera system, so he tries to shut it down. Shadow still hacks into it, but by the time he sets off, Tails is hidden with Cosmo inside the engine room. Just then, Knuckles breaks through everything he can find and confronts Shadow. Knuckles manages to knock Shadow into the wall, but gets distracted by a smoke screen and the appearance of Rouge. She tells Knuckles that Cosmo has sensors planted in her by the Metarex. Meanwhile, Shadow locates Tails and Cosmo inside the X-Tornado and a battle ensues. The X-Tornado is badly damaged, but Tails and Cosmo escape again into the air duct. Shadow follows them, but Tails reaches the top first and hits the shut down button, temporarily trapping Shadow in there with the lasers. Before Tails can move a couple of feet, Shadow spin dashes through the ceiling and prepares for an attack. Knuckles arrives and tries to stop Shadow, who is confident about fighting him. Knuckles gets beaten down by Shadow and left with Rouge. Tails manages to set up the Sonic Driver/Sonic Power Cannon, and traps Shadow inside it. The hedgehog shoots off into space, but reappears via Chaos Control of which the emerald disintegrates, revealing it to be a fake. Tails attacks Shadow, but gets smacked twice. Shadow then walks toward a terrified Cosmo. As he is about to kill her, The Metarex appears and reveals to everyone that Cosmo is a spy, she has a codename White Seed and they monitor what she hears and sees.
74	"Lost Planet" ("Eye Spy") "Rosuto Puranetto" (ロスト・プラネット)	April 8, 2006
Everyone is surprised after they land on a deserted planet. Cosmo is knocked out while the team discovers that Cosmo's brain is emitting a signal to the Metarex. They plan on trying to eliminate the signal, but they notice that the signal is connected to the part of her brain that translates sight and hearing; thus, Cosmo will most likely be unable to see and hear if the chip is removed. While Tails and Chris are torn about this, Knuckles pushes for the surgery. Meanwhile, Amy starts searching for Sonic, but ends up bumping into Rouge. They both discover that this planet is not only Cosmo's homeworld, but the Metarex's as well. They also discover that Cosmo's people were able to transform into huge dinosaur-like beings, known as the "Final Phase" to protect their planet from an alien invasion. However, a few of them wanted to be able to completely destroy the alien horde, and so crystallized the Planet Egg in order to keep the transformation from sapping their energy. They eventually led to the abandonment of the planet. Cosmo, horrified by the fact that the Metarex are using her to spy on them, intends to leave, but Tails reassures her that they all will help her defeat the Metarex. Sonic and the rest of the gang also support the new resolution, and they all are ready for the final attack on the Metarex. Shadow is disgusted by this and tries to leave. Chris tries to tell him that he should help them, yet he keeps refusing, but then Bokkun arrives, telling Shadow that Eggman has been captured by the Metarex. At the same time Dark Oak has 7 Chaos Emeralds and preparation for Forestation is about to begin. Deleted scene: In the Japanese version, after Knuckles finds out about Cosmo's people, like Amy and Rouge, he wonders why the same clan has a different reason to make something correct.
75	"The Day of the Plantations" ("Agent of Mischief") "Morika no Hi" (森化の日)	April 15, 2006
When Bokkun shows everyone Eggman's message (telling that the Metarex are starting to gather at galactic coordinates (0-0-0) because of a thousand-year prophecy), the gang starts lifting off to go beat the Metarex once and for all. They leave Shadow behind. However, the Chaotix find Shadow and offer him a ride to galactic coordinates (0-0-0). Once Sonic and the gang reach (0-0-0), they find the Metarex fleet there, ready while a Planet Egg warps in from another universe. The Egg is in the center of a planet of water, which, combined with the light of the Chaos Emeralds, help Dark Oak, Black Narcissus and Pale Bayleaf to mutate into giant plant-dragons Sonic's fleet starts attacking the planet, but then Sonic is catapulted into the air by a pillar of water. Dark Oak then swallows Sonic, who plunges face-first into the planet. Meanwhile, Chris infiltrates Dark Oak's ship to blow Eggman, Bocoe, and Decoe out. At the same time, Shadow and the Chaotix fight more Metarex, Shadow asking every Metarex he comes across where Dark Oak is. Eventually, the ship comes apart to reveal a giant tree, which attaches to the aquatic planet and starts growing to an unimaginable size.
76	"Showdown! Dark Oak" ("The Light in the Darkness") "Kessen! Dāku Ōku" (決戦！ダーク・オーク)	April 22, 2006
Amy tries to rescue Sonic from the watery planet, but everyone else keeps her back, trying to come up with another plan. Then, Knuckles comes up with a brilliant idea: use the Master Emerald to cut off the energy supply to Dark Oak. The team charges up the Sonic Driver/Sonic Power Cannon with the Master Emerald and fires it at Black Narcissus and Pale Bay Leaf, destroying them. After this is done, the Master Emerald shatters, and it is revealed that the Metarex have sucked up all the Chaos Emerald's energy. Dark Oak's beast head becomes extremely weak because of a hit from the Sonic Driver/Sonic Power Cannon, and finally ceases movement. The planet expands, taking Dark Oak along with it. Inside the planet, Sonic sees what happens after the Forestation process is complete. He manages to fight a bunch of sand monsters and plant-like tentacles, only to find out he's fighting in a dream and Sonic runs at full speed. Suddenly, Amy spots Sonic inside the planet is able to get Sonic out of there, crashing through the roots into the water to rescue him but is knocked unconscious. Sonic then catches Amy and stares at her in awe. However as Amy and Sonic are going down an energy sphere surrounds them, protects them and heals them. Chris (who's on the Hyper Tornado) rescues Sonic and Amy. Suddenly, the planet condenses into a giant seed.
77	"I Can Do It for Your Sake" ("A Fearless Friend") "Kimi no Tame ni Dekiru Koto" (君のためにできること)	April 29, 2006
When the giant Metarex seed, Final Nova, finally reaches the final stage of its metamorphosis and starts sucking the life out of everyone except for Cosmo, she tries to take the Chaos Emeralds to Eggman, thinking that he'll know what to do. Dark Oak attacks Cosmo, who drops the Chaos Emeralds into space. Thankfully, the planet egg responded the Chaos Emeralds and their power is restored again. Sonic and Shadow use them to transform into their Super forms and proceed to attack Final Nova. However, Final Nova creates a force field, preventing Sonic and Shadow from moving. While Cream was pleading for hope, Cosmo hears her Mother, Hertia/Earthia, calling to her and saying that she can save everyone, and that she just has to take off the amulet on her chest, which prevented her from going into her "final phase". She then transforms into her final state and heads toward the planet. Cream is seen running into the room with everyone else, crying "Cosmo! Cosmo!". Cosmo passes through the gravitational force that neither Super Sonic nor Super Shadow could pass through, and plants herself on top of it, fusing with Final Nova. She then becomes a tree, saying that Final Nova cannot attack now and the gang can safely fire at the planet and destroy it. Eggman says that there is nothing they can do about Cosmo dying in the process, and that if they try to separate them, something catastrophic may happen. Everyone is shocked and does not know whether or not to risk saving the universe if they are going to kill her. Knuckles begins to freak out and yell at everyone, but Rouge stops him eventually, saying that they are concerned about the situation as much as he is (This was deleted for the English dub). Tails finally requests that everyone leaves the room, and a teardrop falls (This was also deleted for the English dub), which shows his feelings for Cosmo. During the setup of the Sonic Driver/Sonic Power Cannon, Before Sonic starts spinning, Shadow enters the cannon just in time, which made the energy in the cannon spike. Tails is just about to fire the cannon, but then bangs his head on the control panel (This was also deleted for the English dub). Tails says that he could not do something like this to Cosmo (This was also deleted for the English dub). Eggman asks Tails if he knew what she was feeling. Tails says that he does, but he still does not want to kill her. Cosmo asks Tails to forgive her of all the problems she caused, with Tails' reply being that she never gave him problems and enjoyed helping him. Tails begins to flashback before saying "Cosmo, I...I LOVE YOU!" and finally firing Super Sonic and Super Shadow at the Planet, completely destroying it, including Cosmo. Tails is shown crying as the planet was being destroyed. In a white void, Cosmo thanks Tails for all the good times he has spent with her and she confesses to him as she disappears in an anti-climatic flash of light (This is cut in the English dub, except for her flying away, which was instead reversed).
78	"The Place Where Planets Are Born" ("So Long Sonic") "Hoshi no Umareru Tokoro" (星の生まれるところ)	May 6, 2006
The episode starts off with Vanilla stopping by the Chaotix Detective Office to thank the Chaotix for all that they did for her and Cream. Amy and Cream then bring a whole bunch of snacks to Tails to try to cheer him up. (Note: This entire first part, almost four minutes long, was cut in the English dub of the episode.) Chris and Knuckles have a little discussion about what is next for Chris, and they fall along the lines of where Chris' home would be now that he cannot go back. Rouge is seen in Eggman's ship staring at Shadow's pod. After a run-in with Eggman, Rouge suspects that he's hiding something about Shadow. Chris then flashes back to the point just when the planet with Cosmo on it was being destroyed. Lucas is seen following Hertia to peace. Suddenly, the planet begins to expend all of its energy. Punching Sonic out of the way, Shadow uses the last of his energy to perform Chaos Control to stop time, giving everyone else a chance to escape. Eggman then worries that Shadow may not have survived the Chaos Control he did to save everyone, and he begins to feel some remorse for Shadow. Meanwhile, Sonic approaches Tails with only a seed from Cosmo. Tails, already upset about losing her, finally falls into Sonic's arms, punching him and crying to him that he could bring her back and that he believed in him as they fly away. Near the end of the episode, Bokkun gives Chris a letter, which surprisingly was not rigged. When Chris arrives at the location he was supposed to go to, Eggman shows Chris an egg-shaped pod that will take him home, but there's a catch: Chris only has three minutes to return home, or else he could be stuck in Sonic's world forever. Chris has no time to say goodbye to his friends, just as Eggman planned. Chris then leaves Sonic's universe via Eggman's pod. Once Chris is gone from sight, Eggman says that with Chris out of the way, he can continue in his creation of the Eggman Empire. The Sonic's gang proceeds to seek revenge, while Shadow is seen placing a flower near a grave, presumably Molly's grave (This is cut in the English dub). After the gang sets off, a pot with the seed (apparently the one Sonic found) is shown, meaning that resurrection of Cosmo could be possible. The episode and the series ends as the pod with Chris in it flies out into space and then twinkles out.

Theme songs

Japan

• Openings

1. "SONIC DRIVE"
   • April 6, 2003 - March 28, 2004
   • Lyricist: Takeshi Aida / Composer: Cheru Watanabe / Arranger: Cheru Watanabe / Singers: Hironobu Kageyama & Hideaki Takatori
   • Episode Range: 1-78

• Endings

1. "Fu-tu-re" (ミ・ラ・イ, Mi-ra-i)
   • April 6, 2003 - June 29, 2003
   • Lyricist: Kazuyoshi Baba / Composer: Kazuyoshi Baba / Arranger: Kazuyoshi Baba / Singers: RUN&GUN
   • Episode Range: 1-13
2. "Shining Road" (光る道, Hikaru Michi)
   • July 6, 2003 - December 28, 2003
   • Lyricist: Shun Taguchi / Composer: Masataka Matsutoya / Arranger: Masataka Matsutoya / Singer: Aya Hiroshige
   • Episode Range: 14-39, 53-78
3. "T.O.P"
   • January 4, 2004 - March 28, 2004
   • Lyricist: KP / Composer: URU / Arranger: URU / Singer: KP
   • Episode Range: 40-52

United States

• Opening

1. "Gotta Go Fast"
   • August 23, 2003 - May 6, 2006
   • By Norman Grossfeld and Russell Velazquez
   • Episode Range: 1-78

PAL regions

For most PAL regions, the opening song is performed by a male and female singer repeating the show's title numerous times.

South Korea

South Korea has the same melody of the Japanese theme, with the lyrics translated into Korean.

Italy

Italy has a different opening theme with different music.

France

France has the same melody of the Japanese theme, but it is translated into French lyrics instead.

Home video releases

Japan

The episodes were split up and released in VHS and DVD volumes. Volumes 1-10 were also released in "Hi-Spec" DVD formats.

VHS/DVD Name	Episodes	Release Date
ソニックX Vol.1	1. "Enter the Supersonic Hedgehog!" 2. "Infiltrate! Area 99" 3. "Dr. Eggman's Ambition" 4. "Get the Chaos Emerald!" 5. "Clash!! Sonic VS Knuckles"	July 23, 2003
ソニックX Vol.2	6. "Fierce Battle! School Wars" 7. "Giant Free-for-All! Chris' House Party" 8. "Emergency Launch! X-Tornado" 9. "Amy on the Beach"	August 21, 2003
ソニックX Vol.3	10. "Fierce Fight! Sonic Baseball Team" 11. "The Beautiful, Mysterious Thief Rouge Arrives" 12. "Eggman's All-Out Base Attack! (Before)" 13. "Eggman's All-Out Base Attack! (After)"	September 26, 2003
ソニックX Vol.4	14. "Chase After the Hero Sonic!" 15. "The Mobile Fortress Attacks" 16. "Shoot for the Sunken Ship in the South Sea" 17. "Knuckles! Clenched Fists of Anger"	October 22, 2003
ソニックX Vol.5	18. "Huge Shoot-Out on the Savanna" 19. "The Ghost of King Boom Boo in the Old Castle" 20. "Combat Mission! Egg Fort II" 21. "Speed Match! Sonic vs. Sam"	November 21, 2003
ソニックX Vol.6	22. "Summer Vacation Chao Observation Diary" 23. "Mayhem! 6 Chaos Emeralds" 24. "Wild Sonic! Strategic Capture Operation" 25. "The Last Chaos Emerald"	December 17, 2003
ソニックX Vol.7	26. "The Birth of Super Sonic" 27. "The Beginning of Disaster" 28. "The Puzzle of the Liquid Life Form, Chaos" 29. "Amy the Captive"	January 21, 2004
ソニックX Vol.8	30. "Egg Carrier Battle" 31. "Gamma the Wanderer" 32. "The Cry of Perfect Chaos" 33. "The Secret of Project Shadow"	February 21, 2004
ソニックX Vol.9	34. "Sonic the Fugitive" 35. "Escape From Prison Island" 36. "Threat From Outer Space"	March 24, 2004
ソニックX Vol.10	37. "Space Colony ARK Battle" 38. "Maria's Request, Everyone's Request" 39. "The Chaotix Detective Agency"	April 21, 2004
ソニックX Vol.11	40. "Eggman Corporation" 41. "We Can See the Light!" 42. "Amy, Love's Escape Journey?!" 43. "Huge Home Electronics Panic!"	May 21, 2004
ソニックX Vol.12	44. "The Ridiculous Epic Spy Battle" 45. "Sonic Battle - Face Off!!" 46. "Sonic Battle - Finale!!" 47. "Decisive Battle on the Equator!!"	June 23, 2004
ソニックX Vol.13	48. "Sonic Versus the Monster from Underground" 49. "The Day the World Stood Still" 50. "Morning of Farewells" 51. "Chris' Long Journey" 52. "Memories of the Wind"	July 21, 2004

United States

In the U.S., episodes 1-52 were released in 10 single-disc releases:

DVD Name	Episodes	Release Date
Sonic X: Vol. 1: A Super Sonic Hero	1. "Chaos Control Freaks" 2. "Sonic to the Rescue" 3. "Missile Wrist Rampage" 27. "Pure Chaos"	June 1, 2004
Sonic X: Vol. 2: The Chaos Factor	4. "Chaos Emerald Chaos" 5. "Cracking Knuckles" 6. "Techno-Teacher" 7. "Party Hardly"	June 1, 2004
Sonic X: Vol. 3: Satellite Swindle	8. "Satellite Swindle" 9. "The Last Resort" 10. "Unfair Ball" 11. "Fly Spy"	October 12, 2004
Sonic X: Vol. 4: Beating Eggman	12. "Beating Eggman (Part 1)" 13. "Beating Eggman (Part 2)" 14. "That's What Friends are For" 15. "Skirmish in the Sky" 16. "Depths of Danger"	December 7, 2004
Sonic X: Vol. 5: Sonic's Scream Test	17. "The Adventures of Knuckles and Hawk" 18. "The Dam Scam" 19. "Sonic's Scream Test" 20. "Cruise Blues" 21. "Fast Friends"	January 25, 2005
Sonic X: Vol. 6: Countdown to Chaos	22. "Little Chaos Lost" 23. "Emerald Anniversary" 24. "How to Catch a Hedgehog" 25. "A Dastardly Deed" 26. "Countdown to Chaos"	April 12, 2005
Sonic X: Vol. 7: Revenge of the Robot	28. "A Chaotic Day" 29. "A Robot Rebels" 30. "Heads Up, Tails!" 31. "Revenge of the Robot" 32. "Flood Fight"	June 14, 2005
Sonic X: Vol. 8: Project Shadow	33. "Project: Shadow" 34. "Shadow Knows" 35. "Sonic's Big Break" 36. "Shadow World" 37. "Robotnik's Revenge" 38. "Showdown in Space"	November 15, 2005
Sonic X: Vol. 9: Into the Darkness	39. "Defective Detectives" 40. "Sunblock Solution" 41. "Eggman for President" 42. "A Date to Forget" 43. "Mean Machines" 44. "Sewer Search"	February 7, 2006
Sonic X: Vol. 10: The Beginning of the End	45. "Prize Fight" 46. "A Wild Win" 47. "Map of Mayhem" 48. "The Volcanic Venture" 49. "The Beginning of the End" 50. "Running out of Time" 51. "Friends 'Till the End" 52. "A New Start"	May 16, 2006

They were re-released in "Saga" sets:

DVD Name	Episodes	Release Date
Sonic X: New World Saga	1. "Chaos Control Freaks" 2. "Sonic to the Rescue" 3. "Missile Wrist Rampage" 4. "Chaos Emerald Chaos" 5. "Cracking Knuckles" 6. "Techno-Teacher" 7. "Party Hardly" 8. "Satellite Swindle" 9. "The Last Resort" 10. "Unfair Ball" 11. "Fly Spy" 12. "Beating Eggman (Part 1)" 13. "Beating Eggman (Part 2)"	November 13, 2007
Sonic X: Chaos Emerald Chaos	14. "That's What Friends are For" 15. "Skirmish in the Sky" 16. "Depths of Danger" 17. "The Adventures of Knuckles and Hawk" 18. "The Dam Scam" 19. "Sonic's Scream Test" 20. "Cruise Blues" 21. "Fast Friends" 22. "Little Chaos Lost" 23. "Emerald Anniversary" 24. "How to Catch a Hedgehog" 25. "A Dastardly Deed" 26. "Countdown to Chaos"	May 20, 2008
Sonic X: Chaos & Shadow Sagas	27. "Pure Chaos" 28. "A Chaotic Day" 29. "A Robot Rebels" 30. "Heads Up, Tails!" 31. "Revenge of the Robot" 32. "Flood Fight" 33. "Project: Shadow" 34. "Shadow Knows" 35. "Sonic's Big Break" 36. "Shadow World" 37. "Robotnik's Revenge" 38. "Showdown in Space"	September 23, 2008
Sonic X: The Egg Moon, Emerl & Homeward Sagas	39. "Defective Detectives" 40. "Sunblock Solution" 41. "Eggman for President" 42. "A Date to Forget" 43. "Mean Machines" 44. "Sewer Search" 45. "Prize Fight" 46. "A Wild Win" 47. "Map of Mayhem" 48. "The Volcanic Venture" 49. "The Beginning of the End" 50. "Running out of Time" 51. "Friends 'Till the End" 52. "A New Start"	September 22, 2009

Episodes 53-78 made their way to the U.S. in two 13-episode box sets:

DVD Name	Episodes	Release Date
Sonic X: The Complete 5th Season	53. "A Cosmic Call" 54. "Cosmic Crisis" 55. "H2 Whoa" 56. "An Enemy in Need" 57. "A Chilling Discovery" 58. "Desperately Seeking Sonic" 59. "Galactic Gumshoes" 60. "Trick Sand" 61. "Ship of Doom" 62. "An Underground Odyssey" 63. "Station Break-In" 64. "A Metarex Melee" 65. "Mission: Match-Up"	October 31, 2006
Sonic X: So Long, Sonic	66. "Clash in the Cloister" 67. "Teasing Time" 68. "A Revolutionary Tale" 69. "The Planet of Misfortune" 70. "Terror on the Typhoon" 71. "Hedgehog Hunt" 72. "Zelkova Strikes Back" 73. "The Cosmo Conspiracy" 74. "Eye Spy" 75. "Agent of Mischief" 76. "The Light in the Darkness" 77. "A Fearless Friend" 78. "So Long Sonic"	February 13, 2007

United Kingdom

UK DVD

• Volume 1 - Episode 1-2
• Volume 2 - Episode 3-4
• Volume 3 - Episode 5-6
• Volume 4 - Episode 7-8

Australia

In Australia, 17 volumes of the first series were released by MRA Entertainment in 2005-2006, which featured three episodes per disc.