Being a spriteswap of RicePigeon's Giratina, Arceus plays in the exact same way, even teleporting the opponent into another dimension when its health gets low enough on the second round and any that follow. The only real difference between Giratina and Arceus is the name and that Arceus doesn't change forme between attacks. It cannot be controlled by the player.
This character is controlled solely by the A.I., so no activation methods are present.
Shiny (Shiny colours)
This character does not have any victory quotes, meaning it uses the screenpack's default.