This is the movie based on the phenomenon that has also spawned a popular Japanese anime TV series, Pokémon (known as Pocket Monsters in Japan), a Manga comic book series, and several Nintendo and Gameboy video games.
Pokémon is set in a fantasy world populated by 151 different imaginary creatures called Pokémon, each possessing unique, special powers or abilities. In the Pokémon environment, human beings act as Pokémon trainers, capturing as many of the creatures as they can. The Pokémon then join the trainer's team and help capture other Pokémon, enabling their human companions to become "Pokémon Masters."
In the film, Ash Ketchum, accompanied by his friends Misty, Brock and Pikachu (a favorite, electrically charged Pokémon), continues his quest to become the world's greatest Pokémon trainer. The challenge is greater than ever when Mewtwo, a bio-engineered Pokémon, creates a strain of Super-Pokémon and sets the stage for the ultimate Pokémon battle.
This film comes with the 22-minute animated short "Pikachu's Vacation" attached to the beginning, starring four new Pokémon.