Unova is the only region you can play through in Black and White.
You can't.
You can't.
There is no kanto champion. But there is sinnoh champion Cynthia at undella bay
Yes it is Choas Black
Sadly, you cant
No you cannot find Gary in Pokemon black/white but you can find him in the kanto region.
some show up in white forest
go on serebii.net and look at their pokedex. it will tell you all Pokemon from kanto to Iishu (Pokemon black/white)
Just like the regular Pokemon In Kanto.
You cant go to kanto in the sinnoh Pokemon games.
You are currently in the kanto region!
what emerald-kanto