You can't. Like every other game, aside from Gold/silver/crystal/hg/ss, you only get to explore 1 region. However, you only explore about 2/3 during the storyline. After you beat the game, you get another 1/3 of the map to explore.
no unless training is more important than catching rare pokes from other regins ur choice (i finished white and my best freind has black and even he liked white better)
there is only two regins.
yes kanto and jhoto
Roman Regins
Pokemon White, and other copies of Pokemon Black.
it depends on what game you have In fire red, and leaf green you can get pokemon from johto and hoenn Soulsilver and Heart of gold all the regions apart from Unova. Ruby/Sapphire/Emerald hoenn, Johto and Kanto Dimond/Pearl/Pateinum All the reigons apart from unova Black/White/ Black 2/ White 2 - All the regions Pokemon X and Y - all the other reigons and including new starters and new eeveeolution (Game out this october for 3DS) To tget pokemon from other rigons you will have to trade, but on Black/White/Black 2/White 2 if you have two DS and a game like Pearl you can transfer over.
no,there is no other reigon in pokemon black and white.
you can't get the pokemon off of pokemon black on diamond, but you can do it the other way around.
there are no other regions in Pokemon black or white.
after you beat the Pokemon league
All the starters evolve in Pokemon Black. Many other Pokemon evolve as well.
roman regins is a wwe superstar.he is 6 times wwe world hevi whight champiman.