Sadly no.
Chat with our AI personalities
No u can't
You can only be in the hoenn region you can travel to any other regions
Go to other regions and talk to the professors sorry that's all i know
Unfortunantly you cant go to other regions in Pokemon diamond and pearl. its not like leafgreen,firered,gold,silver and crystal version where you travel to different regions. You can't, Sinnoh is the only region available in the game.
trade from other games