you cant
you can't
no,there is no other reigon in pokemon black and white.
Mostly likely, Pokemon is too profitable to stop making games at this point.
Maybe
U CAN NOT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Sorry its in another region
You can't. Unova is the only region for Black and White.
YOU HAVE THE HACKROOMS
No. You can migrate Kanto Pokemon to your Platinum or catch some in the wild, but you cannot access one region from a game set in another region.
This is completely false, Nintendo did NOT program another region in Pokemon Diamond, besides Sinnoh.
Apart from the Battle Frontier, no.