Palkia: Spear pillar Mespirit: Lake Verity Azelf: Lake Valor Uxie: Lake Actuity
The three lakes , full moon island , Mt Coronet , Spring Path and stark Mt you must defeat the Pokemon league and get national pokedex
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.
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
All except for Garitinia and all from Pokemon black and white.
g;r;g;g
You die
No, you can't find all the legendaries in Diamond. There isn't a Pokemon game with all the legendaries in it. You can capture 8 legendaries in Diamond, f you want all the legendaries, you'll need to visit events, trade or migrate them.
the legendaries can be found when you defeated all gyms
You Have To Beat All Of The Gyms, Elite Fours And the Champions. But Its Complicated To Find Legendaries.
Migrate Pokemon from the old games, use the global trade station, trade with friends, go to Pokemon events for the hard to find legendaries and catch the Pokemon available in the game.
there has not been one made. There is no code but if you get the pokedex compete code, you can go to the GTS. I did that and i have ALL the legendaries! -Hawkfur
their are 12 new ones but Lucario is not included because it is not a legendary because it can breed and it evolves. There are 493 Pokemon (counting the mystery gift Pokemon) in all and only 34 legendaries in the national pokedex
all the legendaries and how to get them here http://www.psypokes.com/emerald/legendaries.php