Recalling a diary he encountered during his travels, Red deduces this to be an artificially made Pokémon named Mewtwo.
Pokémon | Pokémon Red and Blue | ''Pokémon Red'' and ''Blue'' | Pokémon Gold and Silver | Pokémon (anime) | Pokémon FireRed and LeafGreen | X-Men Origins: Wolverine | ''Pokémon Gold'' and ''Silver'' | Pokémon Ruby and Sapphire | Pokémon Diamond and Pearl | ''Pokémon Diamond'' and ''Pearl'' | ''Pokémon'' anime | Pokémon (video game series) | Pokémon Trading Card Game | ''Pokémon Ruby'' and ''Sapphire'' | ''Pokémon FireRed'' and ''LeafGreen'' | Pokémon Conquest | Batman: Arkham Origins | Pokémon Ranger and the Temple of the Sea | Pokémon Pinball | Origins Game Fair | ''Pokémon Red'' | ''Pokémon HeartGold'' and ''SoulSilver'' | ''Pokémon Black 2'' | Pokémon Battle Revolution | Pokemon | Midway Arcade Origins | The Pokémon Company | The Origins of The Koran: Classic Essays on Islam’s Holy Book | The Nature and Origins of Mass Opinion |