i think you mean Dialga
you can't unless you have AR
you can find legendary Pokemon by using your Pokemon tracker
All, provided you have seen them.
uxie azelf dialga, mespirite, girantina and heetran
yes it is a legendary can only be find i think in Pokemon diamond pearl and platinum
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.