Arceus (アルセウス, Aruseus),
known as the Alpha Pokémon or "The Original One", is the ultimate legendary Pokémon. Arceus premiered with the fourth generation but did not officially appear in Pokémon Diamond and Pearl. It has a white coloured body, gray underside, a long mane, gold hooves, green eyes with red pupils, and has a large, golden wheel around its abdomen, connected by spikes filled with gems.
It is said in a book called "The Original Story" that Arceus was born from an egg in a vortex of pure chaos. However, Arceus's creation is described as occurring when "the original one breathed first" at Canalave Library. After it was born, it created two beings from itself, one of time (Dialga), one of space (Palkia), and then three more beings (Azelf, Uxie, and Mesprit). The first two created matter and the next three created spirit, while Arceus went to eternal 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. The story contradicts Mew being the ancestor of all Pokémon. There is also some debate as to whether Giratina, the third counterpart of Dialga and Palkia that represents dimension, was created by Arceus or was simply an offshoot of other existing creations. In the Pokédex, Arceus is also described that it has said to have shaped the universe, and that it was born before the universe even existed.
Arceus has the Multitype Ability, which allows the player to change Arceus's type to any of the other sixteen types by having it hold various elemental plates found throughout the game. Oddly, there is a sprite for a ??? Arceus, but no plate for it, possibly to prevent crashes from hacking. Arceus's signature move, "Judgment", works hand in hand with the elemental plates, and has the appearance of colorful streaks of light energy shooting through space like meteors. Arceus also has the highest Base Stat Total of any Pokémon to date. Its base stat Total is 720, with each stat having a value of 120. Due to its power and rarity, it is known by many fans as the "god of Pokémon". Despite this however, it cannot learn every TM move, something that Mew can do, leading to debates as to which one was the first Pokémon.