Things You'll Need
Instructions
Walk north when you enter Wallace's Gym. Walk to the panel on your right. Go up, left twice, up and right to avoid falling through the floor. If you step on the wrong panel, you fall to the basement and must fight a trainer.
Go to the second floor. Walk up once, left three times, up twice and right twice. Go down, right three times, down, right, up twice and left three times. Head to the third floor.
Walk up, right twice, up and right twice again. Go down, right and up three times. Walk left twice, down, left, up and left. Head down twice, left twice, down and left.
Go up, left, down and left. Go up once, then left, up twice, right and down. Walk right, up, right and down. Walk right, up and right once more. Go upstairs to the fourth floor. Talk to Wallace to start the battle.
Switch to a high-level electric or grass Pokemon when the battle starts. Use a powerful electric move, like Thunder, or grass move, such as SolarBeam, against Wallace's Pokemon. His water Pokemon are very weak to these types of moves. One or two attacks will knock each of them out.