The legendary Pokemon on Diamond is: Dialga, at a catch rate of 30(don't use your Masterball on it! Otherwise, if you've done the Arecus event, you'll have a horrible time with it.) Darkrai, with a catch rate of 3 Uxie,Mespirit, and Azelf, all with a catch rate of 3 Girintina, with a catch rate of 3 Heatran, with a catch rate of 3 Regigigas, with a catch rate of 3 Creselia, after you beat the game,go to Canlave, and go sailing with the guy in the boat,and it does the exct same thing like Mespirit, with a catch rate of 3 Manaphy, which can be only obtaied in a special event as an egg Phioine, can be obtained by breeding Manaphy Arecus, can be obtained in a special,once a year event, with a catch rate of 3(Note: It can change types, depending on the plate it's holding) Shamyin, at a catch rate of 45(do not use the Masterball!)
the legendary Pokemon in diamond and pearl are dialga and palkia.
No, a Bidoof cannot evolve into any Legendary Pokémon in Diamond.
Heatran
a lot of legendary Pokemon
Dialga
you cant unfourtanately
arceus
you can't catch it because you already beaten the legendary
no
you can't unless you have AR
Empoleon is not a legendary Pokemon. It is the final evolution of Piplup, one of the starter Pokemon in Pokemon Diamond, Pearl, and Platinum.
That would have to be Dialga.