They are Dialga, Giratina, Darkrai, Cresselia, Azelf, Uxie, Mesprit, all four Reggies, and if you consider him one, Heatran.
no
All, provided you have seen them.
yes you can but it is dialga not palkia
The Legendary Pokemon in Diamond are Dialga, Azelf, Mesprit, and Uxie. That's all I know of.
You can't, you'll have to trade.
you can start over
The legendary Pokemon are: Palkia,Dialga,Uxie,Mesprite,Azelf,Heatran,Regigigis,Shaymin,Darkrai,Arceus.
No. You need codes and a friend who has pearl. (and Pokemon ranger) or YOU could have Pokemon pearl and Pokemon ranger not just your friends.
You can get Dialga Mesprit Uxie Azelf Giratina and if you somehow get regirock, regiice, and registeel on to diamond you can also get regigigas
yes....all but the legendary's
The names of the Legendaries in Pokemon Diamond are Uxie, Mesprit, Azelf, Dialga, Palkia, Heatran, Regigigas, Giratina, Cresselia, Phione, Manaphy, Darkrai, Shaymin and the rarest of all Legends in Diamond; Arceus.
Catch all the legendary pokemon. If you are already done with that, create your perfect team, level up pokemon, etc.