Mauville Gym is a location in the Pokémon video game series, specifically found in the Hoenn region. It is known for its electric-type Pokémon battles, making it a challenging destination for trainers. The gym leader, Wattson, specializes in electric-type Pokémon and uses strategies that can surprise unprepared challengers. To earn the Dynamo Badge, trainers must defeat Wattson in battle. The gym features various puzzles and obstacles that require players to navigate through electric panels. Successfully completing the gym challenge not only grants the badge but also allows trainers to use the move Rock Smash outside of battles.