Yes, there are.
Just as Pokémon Gold & Silver Versions did, HeartGold & SoulSilver have Trainers start out in the Johto region. After winning the eight badges and defeating the Elite Four, Trainers can then travel through the Kanto region as well.
http://bulbapedia.bulbagarden.net/wiki/Pokémon_HeartGold_and_SoulSilver_Versions
yes you can you may only go to two which are the Johto (where you start) and the Kanto which you go to after completing the main story.
No, it is set in the Kanto region and hosts special islands off the coast of the region known as the Sevii Islands.
no there is only one
there is only one region
2
Pokemon diamond Pokemon diamond Pokemon diamond
trade from platnium to diamond through either nwc orthrough having 2 ds systems
You have to get the Legendary Pokemon for diamond or pearl. They are at the top of Mt. Mcorent. You have to get the Legendary Pokemon for diamond or pearl. They are at the top of Mt. Mcorent.
its 2 days in real life
finish Pokemon ranger (1) and input the special manaphy code and finish the mission and trade with diamond (must have 2 ds)
No, there are no other regions in Pokemon Diamond.
There is only one region in Pokemon diamond.
there is only the sinnon region is Pokemon diamond
If you mean Pokemon Regions then the answer is no! There are only 4 games with 2 regions and that's Pokemon: Gold, Silver, Heart Gold and Soul Silver!
there is no way to
No.
You can't. But you could migrate from diffrent regions
Pokemon diamond Pokemon diamond Pokemon diamond
The Sinnoh region is the only region in Pokemon Diamond, although the area in the northeast of Sinnoh is like a mini-region.
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.
Pokemon Diamond and Pearl starts in the Sinnoh region and doesn't allow the player to move to other regions. It is considered the fourth generation of Pokemon.
I'm pretty sure because they are in different regions