Without cheating the Legendaries you get in Diamond are: Palkia, Giratina and Heatran. Also, Uxie, Azlef and Mesprite are the three Sinnoh pshycic pokemon... Mesprite is a birch to catch, because it keeps running away. And Cresslia... also runs away... If you had the previous games and you transfer Regice Registeel and Regirock you can get another form in the Snowpoint City Temple. If you go to the Nintendo Official Events to get the special items you can get Shaymin and Darkrai on Diamond. The rest must be transfered from earlier games or cheated for with Action Replay cheats Hope i helped. (If you want some help go to Serebii.net) very good NON-CHEAT site
you can't unless you have AR
i think you mean Dialga
you can find legendary Pokemon by using your Pokemon tracker
All, provided you have seen them.
uxie azelf dialga, mespirite, girantina and heetran
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
you can't unless you have AR
no
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.