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Nightmare Fuel: Code Lyoko

    Code Lyoko 

  • An Alternate Universe example: What if what happened to the Real Life factory in France happened in the show before Jeremie turned on the Supercomputer? That would mean that Aelita and Franz would have died!
  • Some of XANA's attacks do border on this, especially if it's a widespread offensive. XANA-possessed characters can be particularly creepy, and many examples of XANA trying to murder the protagonists (like electrocuting Jérémie) can induce nightmares.
    • Most ways that XANA tries to kill Jérémie can cause Nightmare Fuel. Jérémie gets electrocuted by one of the power sources for the Supercomputer, as well as getting electrocuted by the specters.
    • Also, when he discovers that the one Franz Hopper is actually a polymorphic specter in disguise, it gets pissed at him, turns into smoke to invade his airways, and proceeds to suffocate him while Ulrich can do nothing but watch.
  • Fridge Horror: How do the lyoko warriors know that the virtual sea erases them?
    • Fridge Brilliance: Maybe they saw a monster fall in and then one of them said, "Okay, we now know that the Digital Void is dangerous. Let's stay away, everyone."
  • A lot of the psychotic expressions XANA-fied William makes.
    • Not just him actually, any xanafied person will often arbore a quite scary expression with Voice of the Legion to complete.
  • This lovely shot of a XANA-possessed Aelita.
    • XANA!Aelita in that episode as a whole reached the creepiest she's ever done.
    • Want to make this concept even scarier? Watch "Ghost Channel" (where Aelita proves she's able to essentially do the same thing XANA could do in the first season, and without needing the towers, could do so unopposed if she wanted to) and then imagine what she and XANA could accomplish if he was able to control her more often.
  • Jérémie scores one with the "Marabounta". Basically, sort of purple goop starts covering Lyoko, devouring initially every XANA monster, then going after the Lyoko-warriors. The heroes were definitively squicked — especially when it ate Yumi. (Seriously, just watch the scene where she is Eaten Alive by the thing. Think how you reacted to that scene, then imagine how she must have felt. You have to wonder just why these kids even do this.)
  • "Attack of the Zombies". The title pretty much says everything by itself.
  • Of course, in animation there's a lot of Art Evolution between pilot episodes and the resulting series themselves, but Garage Kids (in certain scenes) combines Off Model and Uncanny Valley and turns them Up to Eleven. To clarify: Ulrich's avatar has eyes that seem like they came from the first Crash Bandicoot (1996). But still, Tropes Are Not Bad (see What Could Have Been in the Trivia tab).
  • "Killer Music" borders on the High Octane variety. Imagine an MP3 becoming a successful hit. Now imagine it being a simple, looped sentence (I've seen the Italian version and it was like, "Uh, hah, you will never win") creepily reminiscent of synthethizeritis. Now picture it putting each of its listeners in a comatose state. It's especially terrifying when Odd falls victim to it, as he's stuck with a huge grin on his face, thus looking like he'd been murdered by The Joker.
  • Who else shat bricks when we saw XANA's disguise of Jérémie breaking down from "Ghost Channel"? XANA Jérémie's "NOT LOGICAL! NOT LOGICAL!" after the kids decide that he's the fake Jérémie because he doesn't understand that Jérémie would virtualize himself to save his friends. And then the scene where he screams and then tries to kill the characters.
    • Let's admit it, Ghost Channel was the scariest episode of Code Lyoko's first season. For a season with episodes that were mostly Filler and that involved XANA attacking and the team having to deactivate a tower in Lyoko (and that were pretty creepy on their own), it really drove home what kind of a threat this nutcase of a computerized Omnicidal Maniac was, to the point where his pants-browningly horrifying One-Winged Angel form at the climax now serves as the page image. Good Lord.
  • There are also the attacks where XANA takes over animals and uses them to attack Kadic. So far, we got wasps, rats, birds, boar, wolves... the latter even had a scene with Ulrich falling in the middle of said wolves, who immediately start to attack him. The Return to the Past barely saves him.
    • The time XANA took control of a dangerous criminal.
  • Just how quickly Odd and Yumi deteriorate in "Ultimatum" due to being Locked in a Freezer. Yumi starts shivering first and by the time XANA has gotten tired of waiting for Aelita to give herself up, is reduced to being barely able to stand and weakly crying Odd's name as XANA prepares to kill him.
    • And then there's the added idea that Odd might have accidentally caused XANA's later attack of creating an obscenely cold blizzard by telling XANA that cold is lethal to humans.
  • Nobody has posted about the Zero Gravity episode? I mean think about it; the evil computer virus has taken control of FREAKIN GRAVITY to the point where it can just LAUNCH PEOPLE INTO ORBIT WITH EASE.

    Novel series 
  • XANA as Eva has determined the fastest way to get a necessary item is to maim whoever has it. At one point, before getting on the airplane to France, she is seen with luggage, new clothing, and a computer, with no indication as to where she got any of it, except that the T-shirt is stained.

Clone HighNightmareFuel/Western Animation TVCodename: Kids Next Door

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