Hoenn walkthrough section
Pokemon Ruby and Sapphire Phase 5: Petalburg Gym Rooms
Balance Badge Petalburg Gym uses a room system instead of a normal hallway. Each room advertises a battle style like Speed, Accuracy, Defense, Recovery, or One-Hit KO.
Phase 5 Balance Badge Petalburg Gym, Norman, Surf, Route 118, Weather Institute, and Fortree setup. 05 / 10 
Phase 5 section 2 of 5
Petalburg Gym uses a room system instead of a normal hallway. Each room advertises a battle style like Speed, Accuracy, Defense, Recovery, or One-Hit KO.
Petalburg Gym Rooms
Petalburg Gym uses a room system instead of a normal hallway. Each room advertises a battle style like Speed, Accuracy, Defense, Recovery, or One-Hit KO. The trainers use items or tactics that match the label.
You do not have to clear every room to reach Norman, but you should clear several if your team needs experience. If you are playing with level caps, stop before passing Norman’s ace level.