Pokémon: The First Movie

Giovanni, leader of Team Rocket, recruits scientist Dr. Fuji to create a cloned supersoldier from an eyelash of the Mythical Pokémon Mew, with Fuji intending to use the research to clone his deceased daughter, Amber. In a laboratory, the weapon eventually gains sentience and is named Mewtwo. Mewtwo befriends the salvaged consciousness of Amber, named Ambertwo, as well as the clones of other Pokémon in the laboratory. However, Mewtwo becomes traumatized after Ambertwo and the rest of the clones decompose and die. To stabilize him, Fuji tranquilizes Mewtwo, causing him to fall into suspended animation.