This is a list of episodes for the Frenchanimated television series, Code Lyoko. The first season has no set viewing order save for the last two episodes, so it is listed by the order in which it aired. The episodes in the following seasons are numbered in order. The series has a total of ninety-seven episodes: Twenty-six each for the first two seasons, thirteen for the third, thirty for the fourth, and the two-part prequel made alongside the third season. The first three seasons, the prequel, and episodes 66–77 and 79–88 aired on Cartoon Network. Episode 78 and episodes 89–95 of the series aired on Cartoon Network Video and Kabillion, instead of on the network channel itself. The MoonScoop Group announced a sequel series titled which ran for one season and consisted of twenty-six episodes. The series revolves around a gang of boarding school students who travel to the virtual world of Lyoko, within a quantum supercomputer, to battle X.A.N.A., a malevolent AI/multi-agent system who desires to rule all of humanity.
In this season only, the spelling of Jeremy's name is officially "Jeremie." It's changed to "Jeremy" in later seasons
Odd Della Robbia's only ability on Lyoko is "future flash", allowing to see imminent danger to his friends or hidden paths. It is used only in four episodes and is lost after this season
The Desert region has the most appearances
Despite not being able to defend herself, Aelita's special ability is her "power of creation", the power to manipulate and alter the terrain of all four ecological regions of the virtual world
Yumi Ishiyama's power of telekinesis is used in three episodes
Ulrich Stern's Lyoko abilities are "super sprint", "triangulate" and "triplicate"
After many months of hard effort, Aelita is successfully materialized into the real world
Lyoko's CGI is revamped, making it look a lot brighter than in the first season
The spelling of Jeremy's name is officially changed from "Jeremie" to "Jeremy"
As the Supercomputer was updated, Odd lost his ability to see into the future. In its place, he can project a small, light purple energy shield in front of himself
Jeremy has programmed three flying vehicles for the three Lyoko Warriors: the Overwing for Yumi, the Overbike for Ulrich, and the Overboard for Odd
A fifth Sector called "Carthage" reveals itself; the central region of the virtual world where all types of data is accessed, including X.A.N.A.'s. The group call it "Sector Five"
Yumi has an additional Tessen fan, further perfecting her accuracy in taking down several of X.A.N.A.'s monsters all at once. She has also started to utilize her telekinetic abilities to perfect their targeting while in flight
Aelita is revealed to be the daughter of Franz Hopper and that she had lost her human memories after being virtualized on Lyoko. Her pink-haired mother, who had disappeared, debuts but only in the memories of Aelita's past life as a human
X.A.N.A. finally gains the other half of the Keys to Lyoko from Aelita's subconscious and escapes the Supercomputer
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Prequel (2006)
These two episodes were produced and aired as part of season 3.
Jeremy discovers the Supercomputer, turns it on and finds Aelita inside. Having no memory of who she is, Jeremy gives her the name "Maya"
Odd and Ulrich are virtualized in the Forest Sector, where Jeremy first discovered Aelita
X.A.N.A.'s very first attack was an electric monster in the shape of an orb
Yumi Ishiyama, mistakenly called "Yuri" by Ulrich, is virtualized in the Ice Sector, where the very first activated tower is
Sissi Delmas is revealed to have known about the Supercomputer and Lyoko, but divulged the information to her father and Jim Morales out of fear of the danger posed by X.A.N.A.
Aelita learns her name upon touching the interface of the activated tower
Aelita's very first use of her "power of creation" was when she instinctively made a wall of solid ice to defend Yumi
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Season 3 (2006)
Team Lyoko discover the very Heart/Core of Lyoko itself; a huge white sphere with a holographic image of Lyoko in its center, protected by two cube-shaped shields. X.A.N.A. seeks to destroy the Core, provoking the complete destruction of Lyoko and leaving the heroes with no way to fight the evil multi-agent system
Having become fully human since regaining the memories of her past life on Earth, Aelita can now be rematerialized normally via the scanners. She can fight monsters all on her own by emitting small, pink orbs of energy called "energy fields" from her hands which are capable of destroying a single monster from a distance
To prevent the Lyoko Warriors from reaching Carthage, X.A.N.A. has his Scyphozoa possess Aelita and uses her to erase the four main Sectors one by one by entering "Code X.A.N.A." in a way tower
William Dunbar is chosen, if against better judgement, to be the sixth member to strengthen their efforts in finishing X.A.N.A. once and for all. Unfortunately, he is soon possessed and used to destroy the Heart, wiping out Lyoko
Aelita's long-lost father, Franz Hopper, is revealed to be alive somewhere in the internet, having escaped the disintegration of Lyoko
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Season 4 (2007)
Yumi, Aelita, Odd and Ulrich don new attire on Lyoko. Their weaponry and abilities are somewhat multiplied and enhanced:
*Ulrich gets an additional katana
*Aelita has angel wings, which are activated by waving her hand over a star-shaped bracelet, allowing her to fly and carry one other person
Having been under X.A.N.A.'s power for quite some time, William is given an ability called "Supersmoke" which is similar to Ulrich's "Supersprint." His large sword can generate an energy discus and he can also levitate, and see what is happening from great distances away.
Additional supercomputers are discovered to be hidden across the globe, each generating a replica of a single sector of Lyoko. Jeremy devises a teleportation method to materialize his friends at the site of these supercomputers on Earth, with their Lyoko abilities and weaponry intact
Aelita's long-lost mother is revealed to have been abducted by the Men in Black and has not been seen or heard from in many years; her first name is also revealed be "Anthea"
Franz Hopper himself finally debuts but as white energy sphere, as he is incapable of virtualizing himself onto Lyoko in his human form like his daughter. Unfortunately, he ultimately sacrifices himself to enable Jeremy to obliterate X.A.N.A once and for all
Sissi Delmas learns of their virtual adventures as heroes, prompting a final return to the past; after which the team welcome her as a friend
The quintet finally unanimously decide to shut down the Supercomputer