Arceus

Arceus
Arceus is known as the Alpha Pokémon or "The God of the Pokémon", is the ultimate legendary Pokémon. It is said in a book called "The Original Story" that Arceus was born from an egg in a vortex of pure chaos. After it was born, it created three beings from itself, one of time (Dialga), one of space (Palkia) and one of dimensions (Giratina), and then three more beings (Azelf, Uxie, and Mesprit). Those six creatures created matter and spirit, however Giratina was banished to another dimension, to guard the dead, while Arceus went to sleep. This story can be found in the Canalave Library, and can also be told from the various plates the player encounters in the story.
Arceus has multiple forms that represent the seventeen elemental types. depend on the plate which Arceus holds. Strangely, there is a ???-type Arceus sprite, but no possible plate to make it this type