a LOT Beat the battle Frointier ALL GOLD SYMBOLS Fill Your Pokedex CAtch every Pokemon in the world and A lot others
go to this page http://www.serebii.net/diamondpearl/legendaries.shtml this page has all the legendaries you can normally catch in in Pokemon diamond/pearl all other legendaries you have to transfer from a 3rd generation game
you get action replay and get darkrai and get shaymin (real Pokemon) I have all of them you get an action replay at Fred Meyer and get darkrai and shaymin I have all legendaries that can be obtained in the game itself..........
nothing other than catch the other legendaries and leveling up Ur Pokemon preferably at the elite 4
g;r;g;g
In Diamond/Pearl you can capture 8 legendaries. You can get more legendaries through events, trades or migrates. You can find 7 legendaries in both Diamond and Pearl: Cresselia, Giratina, Regigigas, Heatran, Uxie, Mesprit and Azelf. Dialga is exclusive for Diamond and Palkia for Pearl.
All except for Garitinia and all from Pokemon black and white.
After you've caught the main legendary( either dialge or palkia) there will be the three legendaries in the lakes- azelf, mesprit and uxie. :-)
All legendaries can't breed, even the ones that have genders like Heatran.
You die
you can't
pearl
The legendaries in Pokemon pearl are Palkia, Regigigas, Giratina, Cresselia and Heatran.