Now you can capture some legendary Pokemon like Giratina and Heatran.
finish the nation pokedex
Absolutely Nothing.
After 20 wins, your rival's Pokemon level up.
No, you do not have to beat the Elite 4 to get the National Dex in Pokémon Diamond.
Beat Cynthia after Elite Four
After you beat the elite four.
You can get them by winning contests or you can beat the elite four
-mongmong908
Then you beat them:)
You must beat the victory road.Then,you are in the Pokémon League.Beat the Elite Four and then the Champion.Then,you pass the Pokémon League
beat the elite four and shes the champion
To get the National Pokedex, beat the Elite Four.