if its the arceus from Sinnoh then you will trigger the arceus event which is awesome
you can get arceus on Pokemon white only if you get arceus on Pokemon platinum and do poke transfer.
if you want to catch arceus you can,t but if you get Pokemon arceus version avalible on eBay and a connecting cable you can trade arceus with yourself so you can have it on ruby.
You can't yet.
I would have to say Dialga or arceus
Pokemon to be exact dimond and pearl version on a ds
Nothing special happens.
What Do you want? Azure flute to get arceus or arceus (can be shiny)?
sorry u can only get it in platinum version
Arceus cannot be found through normal game play. You must get an Arceus from the Arceus event that took place quite some time ago in order to have it in your game.
arceus is the alpha Pokemon
uxie dialga arceus palkia giritina mesprit manapy
where is arceuse in Pokemon platinum version whe you chach giritina,palkia,and diagla