Wattson
Gym Leader in Hoenn.
About
Wattson leads the Mauville City Gym with Electric-type Pokémon. Ground-type Pokémon are immune to Electric moves, and his Magneton, being Electric and Steel, takes four times the damage from Ground moves. His strongest Pokémon is a level 24 Manectric, and he gives the Dynamo Badge and 
TM34.
Gym battle
VoltorbLv 20Rollout, Spark, Selfdestruct, Shock Wave
ElectrikeLv 20Shock Wave, Leer, Quick Attack, Howl
MagnetonLv 22Supersonic, Shock Wave, Thunder Wave, SonicBoom
ManectricLv 24Holds 
Sitrus BerryQuick Attack, Thunder Wave, Shock Wave, Howl
Rematches
These teams are in the game data, but no battle uses them: rematches are not in the game yet.
MareepLv 36Thunder, Protect, Thunder Wave, Light Screen
ElectrodeLv 36Rollout, Thunder, Explosion, Rain Dance- MagnetonLv 38Holds Sitrus BerrySupersonic, Protect, Thunder, Rain Dance
- ManectricLv 40Holds Sitrus BerryBite, Thunder Wave, Thunder, Protect
PikachuLv 39Thunder, Slam, Rain Dance, Shock Wave
FlaaffyLv 41Thunder, Protect, Thunder Wave, Light Screen- ElectrodeLv 41Rollout, Thunder, Explosion, Rain Dance
- MagnetonLv 43Holds Sitrus BerrySupersonic, Protect, Thunder, Rain Dance
- ManectricLv 45Holds Sitrus BerryBite, Thunder Wave, Thunder, Protect
RaichuLv 44Thunder, Slam, Rain Dance, Protect
AmpharosLv 46Thunder, Protect, Thunder Wave, Light Screen- ElectrodeLv 46Rollout, Thunder, Explosion, Rain Dance
- MagnetonLv 48Holds Sitrus BerrySupersonic, Protect, Thunder, Rain Dance
- ManectricLv 50Holds Sitrus BerryBite, Thunder Wave, Thunder, Protect
ElectabuzzLv 50Swift, Focus Punch, ThunderPunch, Light Screen- RaichuLv 51Thunder, Slam, Rain Dance, Protect
- AmpharosLv 51Thunder, Protect, Thunder Wave, Light Screen
- ElectrodeLv 53Rollout, Thunder, Explosion, Rain Dance
- MagnetonLv 53Holds Sitrus BerrySupersonic, Protect, Thunder, Rain Dance
- ManectricLv 55Holds Sitrus BerryBite, Thunder Wave, Thunder, Protect
As of v0.75.0 · engine 22ba612f