You must have the cheats "Azure Flute". Blow the flute on top of Mt.Coranet. Stairs will appear. Climb them and you'll find arceous. Hope this helped.
ROSIE6000 HERE! the newest Pokemon is arceous. find out more at Pokemon.com!
Event
Azure flute by event
the most powerfull Pokemon is Zaurauk the 5th genaration . No arceous is
you go and poop on your game. Then you give your game to me.
It can only be traded from D/P/Pt. It was only available in special events.
you will need the azure flute at the spear pilar, at the peak of mount coronet
Normal ; Multitype, it's type changes to the type of plate it holds. (Fist, Spooky, Splash, etc.)
ar only
Arceous is the best Pokemon! You will find him in Lv.80 on some place were you find Dialga and Palkia but this time you climb stairs and you fine Arceous... well that's my best hope it help
its arceous u duma$$
you cant get a diamond on Pokemon pearl but you can get a pearl on diammond ...and pearl.