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