I heard the walkthroughs from youtube but you can't
No unfortunately :(
You cannot rebattle Gym Leader in Pokemon White.
you can't but after you go through Stark Mountain and reach the Survival area at the club you can rematch theminside
Unfortunately, you cannot. Once you defeat them, you cannot have a rematch. However, if you want a better challenge, you could rematch the Elite Four. They will definitely level up your Pokemon.
Well There is no way to rematch the gym leaders unless if you hack it!
I heard the walkthroughs from youtube but you can't
You cannot.
Hackless, NO!
You cannot.
No unfortunately :(
No, this feature is only available in Pokemon Emerald.
Walk in and save the game then go in and in out
Only on Pokemon emerald can you rematch gym leaders just wait patiently until they want to rematch you then go to there gym find them and battle them.
You can't rematch them unless you start again
You have to receive their number in the Pokegear and call the at specific times
you can't but after you go through Stark Mountain and reach the Survival area at the club you can rematch theminside