No, you can't find all the legendaries in Diamond. There isn't a Pokemon game with all the legendaries in it. You can capture 8 legendaries in Diamond, f you want all the legendaries, you'll need to visit events, trade or migrate them.
no
All, provided you have seen them.
You can't, you'll have to trade.
you can start over
The Legendary Pokemon in Diamond are Dialga, Azelf, Mesprit, and Uxie. That's all I know of.
yes you can but it is dialga not palkia
The legendary Pokemon are: Palkia,Dialga,Uxie,Mesprite,Azelf,Heatran,Regigigis,Shaymin,Darkrai,Arceus.
yes....all but the legendary's
the legendary Pokemon in diamond and pearl are dialga and palkia.
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
No, a Bidoof cannot evolve into any Legendary Pokémon in Diamond.
Heatran