Black and White haven't been released yet...
Well you can get volcorona in the ruin castle place where alder thinks the light or dark stone is
no you can only get Zecrom in Pokemon white you get Reshiram in Pokemon black in N's castle.
It can be found in the Relic Castle in Pokemon Black Or White
At N's castle
there is no "white" legendary in pokemon white. its black ( and called zecrom) and in the top floor of N's castle and then after u VS N
The Relic Castle is on route 4 where you have to go left and then up again.
Nope, N won't show up again after you beat him in his Castle in Pokémon Black or White.
Yes, but you must beat N at his Castle
it is in the desert near relic castle
You get Reshiram at N's castle after you defeat the elite four.
Yes, you can get Zekrom from "N's Castle" and in black you get Reshiram instead.
go to poke pH lab (on the way to black city or white forest) after you defeat n in his castle