What is the first Pokemon movie?

The first Pokémon movie is called "Pokémon: The First Movie - Mewtwo Strikes Back". It was released in Japan on July 18, 1998, and in the United States on November 12, 1998. The movie follows Ash Ketchum and his friends as they travel to New Island in search of the legendary Pokémon, Mewtwo. Along the way, they must face off against Team Rocket and Mewtwo's powerful clone army.