As a Ghost/Poison type, Haunter has 3 weaknesses, 4 resistances and 3 immunities, about the same as the average Pokémon's 3.3 weaknesses. 4 other Pokémon share the Ghost/Poison typing.

Levitate (always, already counted above): Ground 2× → 0×

Base stats

HP: 45
Attack: 50
Defense: 45
Sp. Atk: 115
Sp. Def: 55
Speed: 95
Total: 405

Haunter has a base stat total of 405, higher than 34% of Pokémon. With Sp. Atk (115) well above Attack (50), it works best as a special attacker. A Speed of 95 beats 76% of Pokémon, so it outspeeds most opponents. With 45 HP, 45 Defense and 55 Sp. Def it is frail and holds up better against special hits.

Haunter's only ability is Levitate.

How to beat Haunter

Haunter takes 2× damage from Ghost, Psychic and Dark moves, so lead with those.

Avoid relying on attacks it shrugs off: Normal, Fighting and Ground moves have no effect on it and Poison, Bug, Grass and Fairy moves are resisted.

Good counters: Tyranitar hits for 2× with Dark-type STAB and resists its Ghost and Poison moves. Ting-Lu hits for 2× with Dark-type STAB and resists its Ghost and Poison moves. Kingambit hits for 2× with Dark-type STAB and is immune to Haunter's Poison moves and resists its Ghost moves.