Dr. Lava's Lost Pokemon - Cut from American Theaters: The Uncut Story of Mewtwo's Origin was a ten minute intro added to the film Mewtwo Strikes Back. It reveals Mewtwo was created

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

Pokémon: The Uncut Story of Mewtwo's Origin (Short 1999) - IMDb

Pokemon Extravaganza! Movie 01 – Myuutwo Strikes Back (Sub) Review

Pokémon: The Uncut Story of Mewtwo's Origin (1999)

Pokémon: The Uncut Story of Mewtwo's Origin (Short 1999) - IMDb

Video: Pokémon: Mewtwo Strikes Back - Evolution Gets Gorgeous New

Mewtwo's Birth [The Uncut Story of Mewtwo's Origin]

Pokémon: The Uncut Story of Mewtwo's Origin (Short 1999) - IMDb

Pokémon: Mewtwo Strikes Back - Evolution (2019) - IMDb

The uncut story of Mewtwo's origin, right before the first movie

Stream episode The Spin-off Doctors: Pokemon: The First Movie: Mewtwo Strikes Back by Jimquisition podcast

Mewtwo's forgotten childhood - Exploring Pokemon: The First