Everyone wants to be prepared to battle the Gym Leaders, the Elite Four, and your rival.The second best training section is on Route 21. Battle the two trainers near the island that has no one on it. You get an average of 3800 EXP when you defeat them both. The best training spot is on Route 6, where you get an average of 4800 EXP when you defeat the trainers. Battle the two campers on the south and the Bug Catcher. Get them all in one VS Seeker rematch.And, for some reason, it usually works when you move two steps from where the camper are, then, go on the path and take one step up and face the lake. It works for some reason.