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Code Lyoko Wiki

The second season of Code Lyoko originally aired from September 19, 2005 to December 9, 2005.


Aelita on Earth

Aelita sleeping with Mister Puck, her childhood toy.

After discovering Aelita's link to the supercomputer and the inability to shut off the supercomputer that stems from it (meaning that if the supercomputer is turned off for whatever reason, Aelita will die too), Jeremie works hard to find new and better ways to fight X.A.N.A.. To that end, he develops three new vehicles for the group. He also develops a new tower-scanning program that instantly detects activated towers, allowing Aelita to live on Earth full time.

While on Lyoko, using their new vehicles for the first time, they :encounter a brand-new creation of monsters X.A.N.A. has made, the Tarantulas, as named by Odd. Aelita is enrolled to Kadic with a room of her own and everything, and she happily accepts the offer and enrolls as Aelita Stones. During a field trip, Aelita suffers from visions, leading her to an old abandoned house, the Hermitage, where X.A.N.A. ambushes her and tries to kill the team inside the house's boiler room. Aelita manages to escape with Odd's help and they deactivate the tower. As Aelita keeps having bad dreams, they eventually lead her to rediscover her past toy, Mister Pück, which has a key to a locker in the local train station.

Jeremie finds a video diary of Franz Hopper, the man who used to own the Hermitage and has worked at Kadic before. However, the diary is locked with a code. X.A.N.A. takes control of Jeremie, destroying the diary. Later, Aelita finds out that she is a good mixer, and she likes mixing so much that makes it her hobby. News of Peter Duncan, a notorious criminal, has escaped the police and Aelita is having serious headaches and passes out during class and is sent to the hospital. There, she has two heart attacks and survives both of them. Jeremie finds out that Aelita's behaviour is because of the supercomputer losing its power and its nuclear battery is needing to be recharged. Peter Duncan, possessed by X.A.N.A., takes Jeremie and makes him change the core of the supercomputer, resulting in Aelita being alive and well again. (New Order, Mister Pück, Final Mix, Common Interest, Déjà Vu)

Sector Five and the Scyphozoa

Sector Five, the fifth region of Lyoko and its main sector.

The Scyphozoa attacking Aelita.

Sometime later in school, Aelita doesn't get along with others well, as Sissi tricks her into entering the boy's bathroom and feeling that no one has time for her, Aelita returns to Lyoko, where X.A.N.A.'s monsters trick her to the edge of Forest Sector and a transportation orb appears, taking Aelita to a new, mysterious sector, where a new monster attacks Aelita to steal her memory. She is saved by the others and brought back to Earth, where she decides to stay while learning to insult Sissi as well. As the team goes to investigate Sector Five, Yumi has to stay behind because of her parents getting suspicious. Ulrich and Odd, however, get devirtualized and Aelita is almost attacked by the Scyphozoa again, but Yumi arrives just in time. Jeremie and Aelita decide to work on an anti-virus that would free her from X.A.N.A's virus. However, as X.A.N.A. takes control over the return to the past program, Aelita is left to Lyoko by the program and the Scyphozoa attempts to steal Aelita's memory again, but is again stopped just in time. In an episode, as she gets a necklace as a Valentine present from a mysterious person (thinking it is Jeremie), she is possessed by X.A.N.A., who created the necklace. Being possessed, Aelita surrenders herself to the Scyphozoa, forcing Odd to shoot her to the point that she could die, which then again forces the Scyphozoa to let her go. Later, the Scyphozoa steals Yumi's DNA code, forcing her to stay in Lyoko.

Aelita chooses to transfer her DNA codes to Yumi, which would leave her memory without protection and X.A.N.A could steal it much more easily. Aelita stops the process, thanks to Ulrich and Odd. Together, they all visit Sector Five and get Yumi's DNA codes back. X.A.N.A. tries his best to get Aelita's memory: materializing Krabs on to Earth, turning people into zombies, causing the team to break up by using a polymorphic clone, and even kidnapping Yumi and Odd. As Aelita keeps seeing her visions, she goes to Sector Five during one mission, only to find out that X.A.N.A probably used the visions to have Aelita come to him willingly. (Uncharted Territory, Exploration, A Great Day, Saint Valentine's Day, Missing Link, A Bad Turn, Attack of the Zombies, Ultimatum, X.A.N.A.'s Kiss, Vertigo, Cold War, Tip-Top Shape, Is Anybody Out There?)

Franz Hopper and Aelita's Past

A young Aelita with her parents, Waldo and Anthea.

Jeremie informs the others that X.A.N.A. has activated five towers at once, and the team goes to the Factory, where they find Franz Hopper, deactivating towers from the interface of the supercomputer without going to Lyoko. He explains that he was a prisoner, but managed to escape and that he was there to help the Lyoko Warriors rid of X.A.N.A.. He reveals that the scanners and virtualization weren't ready for usage and finds out that Yumi has cellular problems in her brains, causing everyone (excluding Aelita) to turn against Jeremie. When Franz sends everyone to Lyoko, Jeremie had found out that 'Franz' is really an impostor, and he helps Aelita to send a replica of her to Lyoko, where the Scyphozoa attacks and destroys it. With his plan in ruins, X.A.N.A.'s polymorphic Franz Hopper spectre disappears and Aelita deactivates the tower in Sector Five. Soon however, in Odd's movie night, Sissi starts acting weird, and the Lyoko Warriors discover that the real Franz Hopper is trying to contact them. Jeremie sends Aelita to decode Hopper's diary, which X.A.N.A tries to take over, but fails and it is revealed that Aelita is actually Franz Hopper's daughter, who lived on Earth a long time ago. X.A.N.A didn't give Aelita an virus, but took a fragment of Aelita away and that he wants to steal the Keys of Lyoko from Aelita's memory, so he can escape from the supercomputer and conquer the world. Aelita tries to shut down the supercomputer and kill herself in the process, but Jeremie prevents it from happening and everyone goes to Sector Five in order to find Aelita's missing fragment. One by one, Odd, Yumi and Ulrich are devirtualized and Aelita gets trapped with the Scyphozoa immediately arriving and stealing her memory, killing her and X.A.N.A breaks out of the supercomputer. Franz Hopper, however, uses all of his powers to revive Aelita, who finally gets her past memories back. Aelita decides that she and the Lyoko Warriors will destroy X.A.N.A, whatever it takes. (Franz Hopper, Contact, Revelation, The Key)

List of Episodes

Ep No. Pro No. Name Image French Title Airdates
1 (27) 203 New Order 27 new order.png Nouvelle donne US: September 19th, 2005
FR: August 31st, 2005
2 (28) 204 Uncharted Territory 28 unchartered territory.png Terre inconnue US: September 20th, 2005
FR: September 7th, 2005
3 (29) 205 Exploration 29 exploration.png Exploration US: September 21st, 2005
FR: September 14th, 2005
4 (30) 202 A Great Day 30 a great day.png Un grand jour US: September 22nd, 2005
FR: September 21st, 2005
5 (31) 206 Mister Pück 31 mister puck.png Mister Pück US: September 23rd, 2005
FR: September 28th, 2005
6 (32) 207 Saint Valentine's Day 32 saint valentines day.png Saint Valentin US: September 26th, 2005
FR: October 5th, 2005
7 (33) 208 Final Mix 33 final mix.png Mix final US: September 27th, 2005
FR: October 12th, 2005
8 (34) 209 Missing Link Missing Link Title.JPG Chaînon manquant US: September 28th, 2005
FR: October 19th, 2005
9 (35) 210 The Chips Are Down 35 the chips are down.png Les jeux sont faits US: September 29th, 2005
FR: October 26th, 2005
10 (36) 211 Marabounta Marabounta Title.JPG Marabounta US: September 30th, 2005
FR: November 2nd, 2005
11 (37) 212 Common Interest 37 common interest.png Intérêt commun US: October 3rd, 2005
FR: November 9th, 2005
12 (38) 213 Temptation 38 temptation.png Tentation US: November 25th, 2005
FR: December 7th, 2005
13 (39) 214 A Bad Turn 39 a bad turn.png Mauvaise conduite US: October 26th, 2005
FR: November 16th, 2005
14 (40) 215 Attack of the Zombies 40 attack of the zombies.png Contagion US: October 4th, 2005
FR: November 23rd, 2005
15 (41) 216 Ultimatum 41 ultimatum.png Ultimatum US: October 5th, 2005
FR: November 30th, 2005
16 (42) 217 A Fine Mess 42 a fine mess.png Désordre US: October 6th, 2005
FR: December 14th, 2005
17 (43) 201 X.A.N.A.'s Kiss Xanaskiss.jpg Mon meilleur ennemi US: October 7th, 2005
FR: January 11th, 2006
18 (44) 218 Vertigo 44 vertigo.png Vertige US: October 24th, 2005
FR: January 11th, 2006
19 (45) 221 Cold War Cold War Title.JPG Guerre froide US: October 25th, 2005
FR: January 18th, 2006
20 (46) 220 Déjà Vu 46 deja vu.png Empreintes US: October 27th, 2005
FR: January 18th, 2006
21 (47) 222 Tip-Top Shape 47 tip top shape.png Au meilleur de sa forme US: October 28th, 2005
FR: January 25th, 2006
22 (48) 226 Is Anybody Out There? 48 is anybody out there.png Esprit frappeur US: November 1st, 2005
FR: January 25th, 2006
23 (49) 223 Franz Hopper 49 franz hopper.png Franz Hopper US: October 31st, 2005
FR: February 1st, 2006
24 (50) 219 Contact Contact Titlecard.png Contact US: November 25th, 2005
FR: February 1st, 2006
25 (51) 224 Revelation 51 revelation.png Révélation US: December 9th, 2005
FR: February 8th, 2006
26 (52) 225 The Key 52 the key.png Réminiscence US: December 9th, 2005
FR: February 8th, 2006


  • In the US airing, several episodes of this season were aired out of order.
  • Several scenes from Season 1, on Lyoko and Earth, can be briefly seen in Season 2's intro.
  • Lyoko has become slightly brighter than it previously was due to Moonscoop buying out Antefilms after Season 1 concluded.
  • This was the last season released in Japan alongside the prequel.


(For production numbers)