This question is world-wide and it's about to be answered! Here it is: Both Mew and Arceus are EXTREMELY powerful, but one is the ancestor of all Pokemon (mew), because he can learn every move. The other is the King of all Pokemon (arceus) because he was the first Pokemon (you may know, top floor of the canalave library, the book titled the original one) and the Pokemon most powerful. But arceus can't learn all moves, he can only become all types of Pokemon. So to wrap this question and put it to an end,
MEW=ancestor, and copier. ARCEUS=king, and first of all Pokemon
ARCEUS=the best Pokemon!
Mewtwo or Arceus or Lugia well from one of those Pokemon I think arceus is the best Pokemon
Arceus - he is the Pokemon god the best is Raquaza ------------------------------------------------------------------------------------------------------------------------- I say Arceus and giritina origin form i think its Arceus and Mew
Arceus was the Pokemon who created the world and the first Pokemon in it Mew therefore Arceus came first but still leaving Mew the first Pokemon.
Arceus
the best Pokemon are darkrai and arceus, but never count out the ansester of all Pokemon, mew
Mew and Arceus.
arceus
Mew, mew was from a lower generation mew came first arceus did not create the world it created its home
Lugia!! I personally think Jirachi, Celebi, and Mew are the best legendaries. I think it is Mew and Arceus but if were talking about black and white as well than put in reshiram and zecrom
arceus because he crated Pokemon but mew created arceus to help make Pokemon then mewtwo came along and made clones for himself and mew stoped him by dgamer297 :D
Well, that is based on opinion. But if you mean power, I believe they are Arceus and Mew and Mewtwo
besides mew its arceus