Hoenn walkthrough section
Pokemon Ruby and Sapphire Phase 3: Gym Strategy - Wattson, The Electric Leader
Dynamo Badge Wattson uses Magnemite Lv. 22, Voltorb Lv. 20, and Magneton Lv. 23. His reward is the Dynamo Badge and TM34 Shock Wave.
Phase 3 Dynamo Badge Slateport, Route 110, Mauville, Rock Smash, and Wattson. 03 / 10 
Phase 3 section 5 of 6
Wattson uses Magnemite Lv. 22, Voltorb Lv. 20, and Magneton Lv. 23. His reward is the Dynamo Badge and TM34 Shock Wave.
Gym Strategy - Wattson, The Electric Leader
Wattson uses Magnemite Lv. 22, Voltorb Lv. 20, and Magneton Lv. 23. His reward is the Dynamo Badge and TM34 Shock Wave. The Dynamo Badge lets you use Rock Smash outside battle.
Gym Leader
Wattson, Mauville Gym
Marshtomp makes this simple, but teams without Ground immunity must respect paralysis, SonicBoom chip, and Magneton's bulk.
Marshtomp is the cleanest answer in the game. Electric moves fail against Ground typing, and Mud Shot hits Magnemite and Magneton super effectively. Geodude can also help, though it must respect SonicBoom chip and any non-Electric coverage.
If you do not have a Ground type, use Fighting attacks into the Steel/Electric Pokemon and keep healing ready. Voltorb can punish careless low-HP Pokemon, and paralysis can slow down a team that looks fine on paper.
Dex quick links
