You can't - their sprites and such aren't programmed into other games.
1, the unova region
The Unova Region. It is very, very far Region.
I think the Isshu region is the same as Unova. And, no you can not trade pokemon from Unova/isshu to any other region because the older games have no data on the new pokemon.
Pokemon Black only takes place in the Unova Region.
of course not . Unova region is not connected with any other regions
You can ONLY go to the Unova region without cheats and hacks. Although after you beat the Elite Four, new routes are unlocked with Pokemon from all of the other regions, though this is still in Unova.
Unown cannot be found in Pokemon White except through Transfer or Trade. The reason for this is because unlike the other Pokemon regions, which were based on regions in real life Japan, the Unova region is based on real life New York. Because in real life these regions are so seperate, they believed that people in the Unova region shouldn't commonly see Pokemon from any other region
Pokemon Black and White take place in the new region of Unova. Just as the old regions like Kanto and Sinnoh are based on Japanese prefectures, Unova is based on New York City. You cannot visit any other regions in Black/White.
its the Unova Region
Unova region
unova
Including Genesect:-155 Pokemon in the Unova region.