As a Fire/Water type, Volcanion has 3 weaknesses, 5 resistances and 1 immunity, about the same as the average Pokémon's 3.3 weaknesses. No other Pokémon has the Fire/Water typing.

Water Absorb (always, already counted above): Water 1× → 0×

Base stats

HP: 80
Attack: 110
Defense: 120
Sp. Atk: 130
Sp. Def: 90
Speed: 70
Total: 600

Volcanion has a base stat total of 600, higher than 90% of Pokémon. Its Attack (110) and Sp. Atk (130) are close, so it can run physical or special moves. Its Speed of 70 is middling (faster than 50% of Pokémon). With 80 HP, 120 Defense and 90 Sp. Def it is bulky and holds up better against physical hits.

Volcanion's only ability is Water Absorb.

How to beat Volcanion

Volcanion takes 2× damage from Ground, Rock and Electric moves, so lead with those.

Avoid relying on attacks it shrugs off: Water moves have no effect on it and Bug, Steel, Fire, Ice and Fairy moves are resisted.

Good counters: Zekrom hits for 2× with Electric-type STAB and resists its Fire and Water moves. Miraidon hits for 2× with Electric-type STAB and resists its Fire and Water moves. Raging Bolt hits for 2× with Electric-type STAB and resists its Fire and Water moves.