Juan/Wallace uses five Pokémon:

- Luvdisc (Level 40): Water type. Weak to Electric, Grass.
- Whiscash (Level 42): Water/Ground type. Weak to Grass (quadruple weakness).
- Sealeo (Level 42): Ice/Water type. Weak to Electric, Grass, Fighting, Rock.
- Crawdaunt (Level 43): Water/Dark type. Weak to Electric, Grass, Fighting, Bug, Fairy.
- Kingdra (Level 46): Water/Dragon type. Weak to Dragon, Fairy.
Strategy: Electric and Grass-type Pokémon are your best counters. Sceptile (evolved from Treecko) or Manectric will be very effective. Whiscash is quadruple weak to Grass, making it an easy target. Kingdra is the biggest threat; its Water/Dragon typing only leaves it weak to Dragon and Fairy (Fairy not in Gen 3). Use your strongest neutral attacks or a Dragon-type Pokémon if you have one (e.g., Flygon). Be wary of Kingdra's powerful attacks. Use status conditions like Paralysis or Sleep to control the battle. Potions and Full Restores are highly recommended for this final Gym Battle.