the legendary in diamond are dialga, azelf, mesprit and usie.
there are many things you have to to befor that is broken
the legendary Pokemon in diamond and pearl are dialga and palkia.
a lot of legendary Pokemon
No, a Bidoof cannot evolve into any Legendary Pokémon in Diamond.
you can't catch it because you already beaten the legendary
only 2 red gyarados and palkia