In Nacrene city, the city after Striaton city.
Yes, like any regular Pokemon game, Pokemon black and white still has gym battles.
You cannot re-battle the Gym Leaders in Pokémon Black and White.
I used fighting type (Timburr) and obliterated the gym
its clay as a gym
Shaga in Pokemon Black, Iris in Pokemon White.
no you cannot but you can battle latias/latios
8!
Cheren
sorry but no
beat the gym leader
You buy them when you beat your 4th gym
you have to beat gym leaders