1. A joke religion created by
hardcore fans of the
Pokémon franchise. Some fans claim to "follow" this religion to identify themselves with other "believers".
2. The moniker used by less fanatic players of the
Pokémon franchise to refer to the in-game mythology, sparse as it is, that references the "Original One" aka Arceus.
1. "Hey Mike, are you a follower of Arceusism?"
"Definently, Arceus forever!"
"Amen to that,"
2. In the Canalave library in the Diamond,
Pearl, and Platinum versions, there is a
book on the third floor that tells of how the Original One emerges from an egg and creates the beings of
time and space as well as the beings that gave life knowledge, emotion, and willpower. He then goes to eternal sleep.
In Platinum there is an event Arceus that allows the
player to hear more of this legend as he/she discovers Plates, which Arceus uses to change type with its ability.