Mewtwo

Description
Mewtwo is a Pokémon that was created by genetic manipulation. However, even though the scientific power of humans created this Pokémon's body, they failed to endow Mewtwo with a compassionate heart. Its DNA is almost the same as Mew's. However, its size and disposition are vastly different.

Move Set
Unknown

Storyline
Appeared in the Cutscene before Pewter Gym to help you save Joey. A second mewtwo appear in the Cutscene for Cerulean Gym 2, revealing himself to be the one beyond thattacks by team rockets the gym leaders, and the aforementioned "General".

Location
Currently, Mewtwo is not available in game, but possibly may appear in more cutscenes and obtainable later in the story.