Wallace, the Champion, uses a powerful Water-type team. His ace is Milotic, which has high Special Defense and the ability Marvel Scale (boosting Defense when statused). Electric and Grass-type Pokémon are your best bet. Manectric, Sceptile, or Ludicolo can be very effective. Be prepared for a long battle and bring Full Restores to counter his healing. Focus on taking down Milotic quickly.
