Question: what games are arceus in?
Answer: Arceus. Arceus (Japanese: アルセウス, Hepburn: Aruseusu) is a Pokémon species in Nintendo and Game Freak's Pokémon franchise. First featuring in the 2009 film Pokémon: Arceus and the Jewel of Life, Arceus is a mythical Pokémon which can first be obtained in the games Pokémon Diamond and Pearl.