History NightmareFuel / PokemonTheFirstMovie

--->"''We dreamed of creating the world's strongest Pokémon.'' ''[[GoneHorriblyRight And we succeeded]].''"''

** His "birth" when he escapes the laboratory and unleashes his full power on the scientists experimenting upon him is, to put it bluntly, [[FamilyUnfriendlyDeath a massacre]]. Fuji's final words before Mewtwo annihilates what's left of the lab--and Fuji with it--are filled with a broken, terrible dread about what he's just unleashed on the world.
-->"''We dreamed of creating the world's strongest Pokémon.'' [[GoneHorriblyRight And we succeeded.]]"

** The fact that he doesn't realise that '''his creator is dead''' may be weird for some viewers.
*** That or Mewtwo may not even care. Not that he would have any reason to--although the one-shot manga took it a step further in that it killed Fuji, its father-figure (not to mention a version of a ''canon character'' in the games who doesn't die), ''on request'' to take his knowledge of Mewtwo's creation to the grave. It's implied Mewtwo has nightmares about it.

* Nurse Joy as Mewtwo's servant; her mindless, almost robotic movements and expressions firmly cement her in the UncannyValley.

*** That or Mewtwo may not even care. Not that he would have any reason to--although the one-shot manga took it a step further in that it killed Fuji, its father-figure, ''on request'' to take his knowledge of Mewtwo's creation to the grave. It's implied Mewtwo has nightmares about it.

[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/848.png]]
[[caption-width-right:350:[[GoneHorriblyRight We dreamed of creating the world's strongest Pokémon. And we]] '''[[GoneHorriblyRight succeeded.]]''']]

* [[KnightOfCerebus Mewtwo]]. While Pokémon who are abused usually grow afraid or mistrustful towards humans, this one was driven half insane by them and decides to use its extremely powerful psychic abilities to exact his revenge, human and Pokémon alike. Given his game counterpart's ability in the later series to take on, and possibly even beat, other Legendaries, including Arceus, the god of all Pokémon itself, it's a ''very'' good thing for the universe in the anime that Mewtwo eventually decides to take a more productive approach to finding his purpose in life. The last thing Ash and his friends need is a Pokémon version of [[VideoGame/GodOfWar Kratos]] or [[VideoGame/FinalFantasyVII Sephiroth]] running amok.

'''Neesha:''' Nothing but pain...

[[caption-width-right:350:[[GoneHorriblyRight "We dreamed of creating the world's strongest Pokémon...and we succeeded."]]]]

** Even worse, one could equate this event to the "G"-rated equivalent of a ''mass sniper attack/ambush'', because they are being picked-off one-by-one, without anyone knowing where the downing strike of a Shadow Pokéball could come from, and helpless to intervene.

* Mew himself, despite all his cute antics, turns out to not be as nice nor harmless as it first appears, as after Mewtwo attacks him and sends him flying into the sky, Mew retaliates with equal force, blasting Mewtwo right through a wall. From then on, they engage in a titanic psychic battle, with Mew striking with entirely merciless and lethal intent. In the Japanese script it also appears to have a low opinion of the clones compared to the originals.

** In a brief WidescreenShot scene in which Nurse Joy as a servant asks Mewtwo about sending an invitation to Ash and friends. Mewtwo is sitting in a huge seat which obscures him from us and doesn't reply verbally. But If you look very closely you can see it motioning her with a hand gesture, and Nurse Joy replies "as you wish" and proceeds to send the messenger, further showing how she's practically a living puppet.

** In a brief WidescreenShot scene in which Nurse Joy as a servant asks Mewtwo about sending an invitation to Ash and friends. Mewtwo who's sitting in a huge seat which obscures him from us, If you look very closely you can see it motioning her with a hand gesture, and Nurse Joy replies "as you wish" and proceeds to send the messenger, further showing how she's practically a living puppet.

* [[KnightOfCerebus Mewtwo]]. While Pokémon who are abused usually grow afraid or mistrustful towards humans, this one was driven half insane by him and decides to use its extremely powerful psychic abilities to exact his revenge, human and Pokémon alike. Given his game counterpart's ability in the later series to take on, and possibly even beat, other Legendaries, including Arceus, the god of all Pokémon itself, it's a ''very'' good thing for the universe in the anime that Mewtwo eventually decides to take a more productive approach to finding his purpose in life. The last thing Ash and his friends need is a Pokémon version of [[VideoGame/GodOfWar Kratos]] or [[VideoGame/FinalFantasyVII Sephiroth]] running amok.

* [[http://www.suruga-ya.jp/database/pics/game/978006477.jpg This promotional photo.]] Notable in that it depicts Mewtwo in EvilOverlooker fashion... with its mouth open, despite the fact that it never does so in the actual movie. Which, to be honest, makes the image all the creepier.

* The "evil" black Poké Balls sent to capture every trainer's Pokemon. No matter what they do, they just keep coming back. Poor Pikachu in particular was practically fighting for his life trying to outrun them.

** First, when the computer detects a viable Pokemon DNA sample, that being Meowth, and attempts to put him in the cloning machine. It starts out a little funny with him complaining about it, until he actually goes into the machine, where James grabs him to pull him out, and Meowth is begging for help, literally crying from sheer terror. Jessie and James barely manage to pull Meowth out, but the machine still manages to pluck a few tufts of fur from his tail. It then uses those hairs to complete the cloning sequence, and Meowth's clone slides down the cloning tube. The trio is ''severely'' creeped out by the result.