Mewtwo - The Psychic, Genetic Clone Pokémon

Mewtwo is a Psychic-type Legendary Pokémon that was cloned from the Pokémon Mew. He's unwillingly the Yang of the Pokémon Mew's Yin. Exact opposites in personality, but one that came from the other. That's who Mewtwo is, a forcibly born second Mew. Born for nefarious purposes that ended up backfiring. Despite the fact this Pokémon World doesn't have living humans, history repeated itself. Mewtwo was created after years of horrific gene splicing and DNA engineering experiments based on Mew. He was meant, and the people making him were successful in doing so, to be one of the most powerful Pokémon in existence and is said to have the most sore, coldhearted heart among all Pokémon. He's so powerful that only the Pokémon Mew can rival his power. He was engineered to be the ultimate opponent in battle, implying very nefarious purposes behind his creation.