Nessa uses Water-type Pokémon. Her team includes a Level 22 Goldeen, a Level 23 Arrokuda, and a Level 24 Drednaw (Dynamax). Electric and Grass-type moves are your best bet. If you chose Grookey, its evolution Thwackey will be very effective. Yamper or Electrike (found in the Wild Area) can provide strong Electric-type coverage. A well-trained Oddish or Budew can also be useful. Be mindful of Drednaw's Rock-typing, which makes it weak to Grass, Electric, Fighting, and Ground.
