Soft reset for Pokemon Diamond is R+L+Start+Select.
Yes.
sure can
Migrate it from your GBA game.
Dusclops. Trade it. =]
go to menu, then go to your pokemon, and select one, the menu will come up with a 'Switch' button
Yes.
Soft reset
Behind Dialga when u beat him (only in Pokemon Dimand)
To soft reset hold down L+R+START+SELECt to return to the title menu.
You can't.
Onux are rare ?
There is no Mewthree
sure can
L+R+Select+Start
You could cheat or soft reset.
r+l+start+select
No you don't, you will rarely encounter them in the wild.