Black2 Gym Leader Level Reccomendations?

Question

I want to know a good level for my Pokemon when I challenge each gym.

Answer 1

I say you should fight each gym around the time your Pokemon are tougher than at least one of the gym leader's Pokemon because you are almost guarantee to win even if you have Pokemon at a disadvantage ( As long as you have more Pokemon.)

Hope I helped :)

Answer 2

Check this website:
http://www.serebii.net/black2white2/gyms.shtml

For each gym leader, look at the level at the Pokemon. Try to match Pokemon with effective types and look for levels about 2 or more than your opponent's

Hope I helped! :)