>>49496966>>49497014>>49497121>>49497778>>49499594>>49499715>>49499721>>49499753In Japanese, its name is pronounced A·ru·se·u·su (ア•ル•セ•ウ•ス), so technically Ar-say-oos, but in Pokémon Battle Revolution for the Wii its name in English was officially pronounced as Ar-SEE-us. However, the pronunciation was officially changed from then on out to |Ar-KEE-us| in the Pokémon movie Arceus and the Jewel of Life and that change was made because Ar-SEE-us has the British slang word "arse" in it which, as we all might know, means ass and is pretty much how everyone in the UK says ass.
>...Ass-ee-us, the almighty creator of Pokémon.Name Origin (from Bulbapedia):
Arceus may be a combination of arch- (most extreme, highest), archon (a Greek word that means "ruler" or "lord"), arcanus (Latin for secret, mystery), archaic (ancient), αρχή arkhē (Greek for beginning), or archetypus (Latin for original), and deus (Latin for god). It may also derive from aureus (golden, in reference to its hooves and wheel), arc (round or ring), arcessere (Latin for to summon), or Archeus (an aspect of the astral plane). It may also be a reference to Arcesius, the king of Ithaca mentioned in the Odyssey that was a son of Zeus.
Previous Pronunciation (Battle Revolution):
https://www.youtube.com/watch?v=WBrmIjHTBHs&t=250sOfficial Pronunciation (Movie 12):
https://www.youtube.com/watch?v=YWqh0EL6fqg&t=26s 
