Pokémon: The First Movie - Mewtwo Strikes Back (1998)

The adventure explodes into action with the debut of Mewtwo, a bio-engineered Pokémon created from the DNA of Mew, the rarest of all Pokémon. Determined to prove its superiority, Mewtwo lures Satoshi, Pikachu and others into a Pokémon match like none before. Mewtwo vs. Mew. Super-clones vs. Pokémon. It's the ultimate showdown ... with the very future of the world at stake!