In Pokemon Diamond and Pearl, you will need to use the Action Replay to obtain the Key Item Azure Flute. Once you have it, you'll need to take it to the top of Mt. Coronet where you battled Dialga/Palkia. It should activate a tune, then the staircase going to Hall of Origin will appear. Head up the steps and Arceus' over world Sprite would be standing there. Interacting with Arceus, it will engage a battle.
diamond and pearl. Hope this helps.
There is not an arceus trophy, and arceus was created after brawl, so arceus is not in brawl
Arceus has no gender.
arceus
Arceus.
no
Arceus.
arceus
ARCEUS
Arceus is not avabile. Right now, hack or use cheats to get Arceus.
Arceus has never been distributed as an egg. If you are referring to the egg from the HeartGold/SoulSilver Arceus event, it hatches automatically.
arceus is the alpha Pokemon