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

Dr. Fuji was a brilliant scientist who was trying to clone the legendary Pokemon Mew. He also lost his daughter Ai (Amber in the English dub), in a terrible car accident, Dr. Fuji became obsessed with trying to bring his daughter back by cloning her so his wife leaves him. This is the story of Mewtwo's origin.