Here are some tips for dealing with the electric fence:
* Use Ground-type Pokemon: Ground-type Pokemon are immune to Electric-type attacks, making them ideal for this challenge.
* Use Flying-type Pokemon: Flying-type Pokemon are also immune to Electric-type attacks.
* Use Pokemon with high Special Defense: Pokemon with high Special Defense can withstand Electric-type attacks better.
* Use status moves: Moves like Thunder Wave can paralyze the gym leader's Electric-type Pokemon, making them less effective.
Remember, you don't need to turn off the fence, just find a way to get past it using your Pokemon's strengths!