After you beat the Pokemon League you can travel to the Kanto via the magnet train in Goldenrod City
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!
You can only travel between Johto and Kanto in SoulSilver.
I'm pretty sure because they are in different regions
The pokemon game that has two regions is gold silver and crystal and the remakes of gold and silver heart gold, soul silver although many of the games have areas you have to take a boat to which is close to two regions but not officially a region
Well in travel wise, probably Soul Silver, Heart Gold, Silver, Gold, or Crystal. They can travel to Kanto.
get kyogre and then he can go to all regions so he transports you there
Travel to the border between Kanto and Johto.
sorry you have to trade it to Pokemon soul silver
No you cannot go to other regions in Pokemon Pearl or Diamond version but in Pokemon Heart Gold and Soul Silver you can go to the Jotoh region.
Soul silver is AWESOMENESS!! yes GET IT
According to Serebii.net there are 493 Pokemon in Soul Silver.
no only johto and kanto but you can get the 3 hoenn starters