both through a event to to serebii.net for upcoming events and all things Pokemon and a little Mario
arceus is an event pokemon.
You can only get Arceus by an Event.
Yes, you can.
You can catch Arceus in Diamond, Pearl, or Platinum.
Pokemon Diamond, Pearl, and Platinum have Arceus.
yes!!
you can not get arceus with no action replay
You can catch Arceus in Platinum with the Azure Flute which is obtainable through Official Nintendo Events but otherwise, you will not usually be able to get an Arceus from someone.
yes you can get arceus on any sinnoh game
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