Arceus is a Legendary Pokemon first introduced into the Pokemon World through the fourth generation games via the Pokemon Diamond & Pearl Versions.
National Pokedex No: #493
Classification: Alpha Pokémon
Type: Normal (type changes depending on the plate attached)
Height: 10'06'' (3.2m)
Weight: 705.5 lbs (320kg)
Location: Hall of Origin, requires the Azure Flute, an item only able to be obtained through special Nintendo events ( Diamond, Pearl, Platinum)
Evolves at: n/a
Arceus's name pronunciation in Pokémon Battle Revolution is Ar-SEE-us. However, if compared to the Pokemon movie's pronunciation of Arceus, the officially stated pronunciation announced by Game Freak is Ar-KEE-us.
Pokemon Diamond: It is described in Mythology as the pokemon that shaped the Universe with it's 1,000 arms...
Pokemon Pearl: It was told in Mythology that it was born before the Universe even existed...
Mega Evolutionary Lineage
After introducing a new evolutionary format by attaining a new Mega Evolutionary lineage via a Mega Stone, fans have wondered if certain Pokemon will gain Mega Evolutionary forms.
Primal Reversion Lineage
Similar to Kyogre and Groundon's new Primal Reversion mode discovered in the Pokemon Omega Ruby and Alpha Sapphire Versions, there is a long awaiting reveal for a Primal Arceus when the renovated Gen IV games are recreated.
Similar to how Giratina received a Origin Forme mode discovered in the Pokemon Platinum Version, it is speculated that an Origin Forme Arceus may be introduced into generational games when Gen IV games gain a remake.