go on the adventure log on the main menu then press delete saved data
No,arcus is not in mystery dungeon 1 or 2
No.
Mystery Dungeon 3 isn't out yet. And no, they won't work.
The land, Pokemon, and dungeons are extremely different.
You don't!!
there is no shaymin (or arceus) in mystery dungeon 2. in Pokemon mystery dungeon explorers of the sky (check out serebii.net for that), there is shaymin and arceus, but i don't know if shaymin is recruitable.
Arceus and Shaymin are the only two Pokemon of the series not to feature in Pokemon mystery Dungeon 2
Pokemon Mystery Dungeon 1: Red Rescue Team/ Blue Rescue Team Pokemon Mystery Dungeon 2: Explorers of Time/ Explorers of Darkness
The release date for Mystery Dungeon 2 in Europe was July 4, 2008.
6F, for more information search on Serebii, Pokemon Mystery Dungeon 2 Dungeon List.
lets you see darkrai in Pokemon mystery dungeon 2