When you've completed the WHOLE game (including recruiting Manaphy) go to the beach and talk to Lapras. They will take you to the Hidden Island (I don't know if that's the right name) and you'll have to go back to Temporal Tower, reach the summit and challenge the un-corrupted Dialga. If you win, they will definitely ask to be recruited regardless of your rank or level. Obviously, you accept and, that's it, you got Dialga.
yes. you beat dialga in order to continue
You cannot get Primal Dialga in Pokemon Diamond, only in Pokemon Mystery Dungeon: Explorers of Time/Darkness.
No Dialga is in pokemon mystery dungeon explorers of time & darkness
It depends who your pokemon are. I found him very hard.
Primal(dark)dialga=747HP Dialga(normal)=641HP and yet normal dialga is much harder...
You must have recruted dialga and palkia and finished marine resort
For a complete, step-by-step process of what to do after you beat Dialga, go to www.en.wikipedia.com and type in explorers of darkness in the search box.
you need protect for Bulbasaur and your partner
if you really what to know,i got explorers of darkness and i got todadile and bulbasaur and i hope i helped :) P.S (i am at the part where you beat priminal DIALGA, and it is HARD:0 :( )
He has 800 hp. The second time round he only has about 600.
No. You must defeat Dialga and then defeat palkia and darkrai
First, beat primal dialga. Then, you can play as any Pokemon you recruited including your partner.