pokemon diamond. get the azure Flute play it at the top of mout cornet. or spear pillar. it is at lv 80
You can't catch Arceus in Pokemon soul silver. You must trade it from another game.
You can't
hall of origin
Good question the answer is Mew, Mewtwo Arces
well you can get Shamin Arces Darkrai Creslia and Regigagis
well they already made one Pokemon d/p but you need action replaynote: they will make a aceus movie in USA November 20,2009
TO GET ARCES HOPE THAT HELPED A LOT
get the azure flute and then go to where you met dialga and play it
only with action replay!!! there is no way without action replay
ponyta and rapidash.
arces,palkia,dialga,garitina,ect.
I think it's Arces IDK if it is but I'm thinking it is but good luck trying to find the answer your looking for alright!!!! POKEMON!