Yes you do but you need a oak letter first and the best way is with action re-play.
Shaymin, and 463 is Arceus
Shaymin, Darkrai, and Arceus are event-only Pokemon which an Action Replay is required to catch them today or you can trade for them with a close friend.
www.pokemon.com, dude
You get Shaymin thru Wi-fi as well as Arceus and Cresselia
You can only get Shaymin, Darkrai, Manaphy and Arceus if you have beaten the elite four. You also need a national dex before you can go after any of them. Hope I helped.
you get oaks mail and azure flute
You dont need it to complete the sinnoh dex. You need it for the national dex. I have shaymin and Arceus but i could care less because mine arnt movie mode so they cant get different forms.
Shaymin, and 463 is Arceus
THE LAST 3 r darkrai shaymin and arceus
Arceus
Arceus and Shaymin are in Pokemon Explorers of Sky,i dont know if its in Darkness.?
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.
Darkrai shaymin Arceus
no
No.
Shaymin and darkrai and arceus
He doesn't