Arceus

Arceus is a Pokémon species in Nintendo and Game Freak's Pokémon media franchise, first introduced in the 2006 video games Pokémon Diamond and Pearl and designed by Takao Unno. Despite being featured in Diamond and Pearl, it was not available through official means, instead available through promotional events. It was not obtainable in game until the 2021 remakes Pokémon Brilliant Diamond and Shining Pearl. It is a central figure in the game Pokémon Legends: Arceus, where it sends the protagonist back in time to meet all Pokémon. Since Arceus's debut, it has appeared in multiple games including the Pokémon Trading Card Game, as well as various merchandise.