Arceus is a legendary Pokémon from the "Pocket Monsters" series, known as the creator of the Pokémon world. It holds a pivotal role in the lore of the series, often referred to as the "Original One." With the ability to change its type based on the Plate or Z-Crystal it holds, Arceus is highly versatile in battle. Its divine status and immense power make it a figure of reverence and mystery, often central to stories exploring the origins and cosmology of the Pokémon universe.