A follow-up series, Code Lyoko: Evolution, began airing at the end of 2012. This "sequel" to the series featured live-action sequences for scenes taking place in the real world instead of its traditional 2D animation but retained the iconic CGI for scenes taking place in Lyoko, now with an updated artstyle. The show consisted of 26 episodes with the final episode airing in late 2013, leaving off on a cliffhanger with no second season or other sequel series planned as MoonScoop later filed for bankruptcy in 2014.
Jeremy Belpois, an 8th grade prodigy attending boarding school at Kadic Academy, discovers a quantum supercomputer in an abandoned factory near his school. Upon activating it, he discovers a virtual world called Lyoko with an artificially intelligent girl named Aelita trapped inside it. Jeremy learns of XANA, a fully autonomous, malevolent, and highly intelligent multi-agent system, that also dwells within the Supercomputer. Using the powers of Lyoko, XANA can possess electronics and objects in the real world like a virus to wreak havoc. XANA is determined to eliminate anyone aware of the Supercomputer's existence so it can be free to conquer Earth and destroy all humanity.
Jeremy works tirelessly to materialize Aelita into the real world and stop attacks caused by XANA. Jeremy is aided by his three friends Odd Della Robbia, Ulrich Stern, and Yumi Ishiyama, who are virtualized into Lyoko to save both worlds from the sinister virtual entity. They achieve this by escorting Aelita to various Towers on Lyoko, which serve as interface terminals between Lyoko and Earth. Once the Tower is deactivated, Jeremy can launch a "Return to the Past" program, which sends the world back in time to undo any damage caused by XANA, while anyone scanned into the Supercomputer retains their memory of the events. In "Code: Earth," Aelita is finally materialized, but the group discovers that XANA had planted a virus inside of her that will kill her if the Supercomputer is turned off. They realize that they cannot destroy XANA, or Aelita will be destroyed along with it.
In Season 2, Aelita adjusts to life in the real world, while Jeremy attempts to develop an antivirus program to liberate her from XANA's power. On Lyoko, a fifth sector is discovered and the group explores more of Lyoko's secrets and mysteries. The gang begins to uncover information about a mysterious man named Franz Hopper, who went missing ten years ago. He supposedly created the Supercomputer, Lyoko, and XANA, and is eventually discovered to be Aelita's father. They finally find out that Franz Hopper is indeed alive somewhere, hiding in the uncharted parts of Lyoko to avoid XANA further. All the while, XANA attempts to steal Aelita's memory to gain the Keys to Lyoko and escape into the internet. At the end of the season, the group discovers that Aelita is actually human and does not have a virus, and instead is missing a fragment of herself. In "The Key," XANA tricks them with a fake and succeeds in stealing Aelita's memory and escaping the Supercomputer. Aelita appears to perish as a result but is revived when Franz Hopper restores her completely, along with her missing fragment: the memories of her life on Earth before she was virtualized on Lyoko.
Season 3 shows that since succeeding in escaping the confines of the supercomputer, XANA targets the virtual world itself by destroying each of Lyoko's surface sectors, until only Sector Five is left. Initially reluctant, the Lyoko Warriors decide to invite William Dunbar as the sixth member. However, shortly after being virtualized, he is possessed by XANA. Shortly after, he destroys the Core of Lyoko, destroying the entire virtual world and rendering the group unable to fight XANA, putting the entire real world in danger. After what they thought was their defeat, Jeremy receives a coded message from Franz Hopper that allows him to recreate Lyoko and continue the fight against XANA.
In Season 4, Jeremy and Aelita construct a digital submarine, the Skidbladnir, to travel across the Digital Sea to destroy XANA's "Replikas," which are copies of Lyoko's sectors that are linked to XANA-controlled supercomputers on Earth, all created for its goal of world domination. XANA uses William as its general throughout the season to defend the Replikas and target the Lyoko Warriors in any way he can. To prevent suspicion regarding William's disappearance, Jeremy manages to program a specter to take William's place at Kadic, although the clone has low-level intelligence and acts very stupidly. Near the end of the season, XANA decides to draw energy from all of its Replikas to create the Kolossus, a gigantic monster that later destroys the Skidbladnir. Before it is destroyed, Jeremy frees William from XANA's control. After his return, he has a difficult time gaining the trust of the group. While Ulrich defeats the Kolossus, Franz Hopper sacrifices himself to power Jeremy's "anti-XANA program," which destroys XANA forever upon activation. Shortly after, the group, albeit reluctant due to their nostalgia, decides to shut down the Supercomputer.
Code Lyoko originates from the film short Les enfants font leur cinma ("The children make their movies"), directed by Thomas Romain and produced by a group of students from Parisian visual arts school Gobelins School of the Image.[5] Romain worked with Tania Palumbo, Stanislas Brunet, and Jerome Cottray to create the film, which was screened at the 2000 Annecy International Animated Film Festival.[6] French animation company Antefilms took interest in the film due to its atmosphere and offered Romain and Palumbo a contract to turn it into a series.[2] This led to the development of the pilot, Garage Kids.[5]
Garage Kids was produced in 2001 by Antefilms. The project was created by Palumbo, Romain, and Carlo de Boutiny and developed by Anne de Galard. Its producers were Eric Garnet, Nicolas Atlan, Benot di Sabatino, and Christophe di Sabatino.
Similar to its succeeding show Code Lyoko, Garage Kids was originally envisioned as a 26-episode miniseries detailing the lives of four French boarding school students who discover the secret of the virtual world of Xanadu; created by a research group headed by a character known as the "Professor". The pilot featured both traditional animation and CGI.[7] The Matrix had "enormous influence" on the pilot according to Romain, citing the concept of a machine allowing the characters to dive in a virtual world, an operator who supervises the trip and the correlation between the action in the real world and the virtual world.[2] Anime also served as inspiration, specifically Serial Experiments Lain for its "worrying digital dimension" and Neon Genesis Evangelion for its dangerous entities to fight. While similarities to Tron have been noted, Romain admitted to not having seen the film yet when the series was being developed.
When the concept on the virtual world was added, Antefilms suggested animating it with CGI to help make the series unique, promote a video game theme and make the separation between the virtual and real worlds clearer.[2] While incorporating it, Palumbo and Romain wanted to avoid making the series "too playful and superficial" and sought to "get around the censoring done by TV channels that tend to soften youth programs" by writing episodes "with tension, suspense, even tragic scenes. Things that are hard to imagine seeing in a cartoon series for kids."
A team of artists were recruited in order to give the backgrounds of the real world a realistic appearance. The factory and boarding schools specifically were modelled after locations in France. The factory was based on a Renault production plant in Boulogne-Billancourt (le Seguin), which has since been demolished.[8] The school, Kadic Academy, is based on Lyce Lakanal in Sceaux, which Romain had attended.[2][9] Palumbo and Romain were adamant on keeping the locales based on "the France we knew", as they wanted to avoid what they perceived as "fantastical" or "Americanized" locations other French cartoons used at the time.[2]
Scripting for the series officially began in January 2002, with Frdric Lenoir, Franoise Charpiat, and Laurent Turner being brought on as writers.[10][11] It was around then that Aelita was added, who at this point was an AI who lived on the virtual world. When choosing a director, the team wanted "a new generation" to be in charge of the series.[12] Jrme Mouscadet was hired in June 2002 after having dinner with a friend who worked at Antefilms. While Mouscadet had experience with animation from directing short films at a small company, he never directed a series before. One of his first major contributions was to drop the idea of the characters retaining their powers in the real world, which he decided after wanting to further separate the virtual world from the real world.[13] Progress was slow over the summer of 2002, which Mouscadet attributed to the series' head writer "[taking] a lot of vacation".[12] Antefilms reached out to Sophie Decroisette as a replacement, who had recently been a writer for Malo Korrigan and was on a break after giving birth to her first child.[11] Decroisette described this stage of writing as expanding the concept and finding strong motivations for the characters. On Garage Kids' pilot, she said: "I really just saw a teaser that was focusing on images[. T]here were great ideas in the images, notably the transition from one universe to the other, but plot-wise, it was just "they travel from one universe to the other", with no explanation on "how" and "why". They had no real motivation, they were fighting Xana, which was represented as black spheres, something like this, but none of this was clearly defined. Our job, with the other writers, was to try to introduce "scientific accuracy"". The writers struggled the most with finding a motivation for Jeremy. Charpiat suggested during a meeting that he want to bring Aelita onto Earth, which became the basis for the first season. Another concept emerged from Lenoir in the form of a time travel mechanism to explain how XANA could cause massive damage to Earth, with other people witnessing the destruction, and have the heroes fix it without people becoming suspicious.[11][14] This eventually turned into the supercomputer's "Return to the Past" function.
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