Route 218 requires you to use Surf to cross the water. There are a few trainers on the water. Continue west, and you'll reach Canalave City. In Canalave City, you'll find the Library, the Move Deleter, and the Move Relearner. Your rival, Barry, will challenge you to a battle on the bridge leading to the Gym. His team will have evolved significantly by now. After defeating him, you can challenge the Gym.
