Unfortunately, the only way to get Arceus in the Generation IV games is use the Action Replay to acquire it. Events are discontinued for Generation IV.
So far, there is no Nintendo event to get Arceus for your DS or DSi.
In Japan in December 2010
you cant u need a Nintendo event that u physically have to be at to receive arceus
you need to go to the Nintendo event and use the ranger for manaphy egg and the three:Shaymin, Arceus, Darkrai needs a Nintendo event and the others you have to catch or get from the gts.
no you cant
So far, there is no Nintendo event to get Arceus for your DS or DSi.
It is from an Nintendo Event.
in 2010
there was none that i know of...
In Japan in December 2010
Official events are the only way to catch Arceus.
You have to attend a official Nintendo event. For now Arceus has been released only in Japan.
you need the action replay or a Nintendo event.
Nope.
Yes, but you have to get it from a Nintendo event (If they have any new events for Arceus) or trade with someone who got it from an older event.
Um, WHAT? Anyway, Arceus can be caught in the Hall of Origin (available by Nintendo Event).
The most commonly missed Pokemon in the National Dex are Arceus, Darkrai and Shaymin. These are legendaries in Diamond and Pearl that cannot be caught without action replay or a Nintendo event. Recently there were Nintendo events for all three.