Poke-BODY · Hidden Poison
If Haunter is your Active Pokémon and is damaged by an opponent's attack (even if Haunter is Knocked Out), the Attacking Pokémon is now Poisoned.

HP 70 · Psychic
Pokémon — Stage 1
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If Haunter is your Active Pokémon and is damaged by an opponent's attack (even if Haunter is Knocked Out), the Attacking Pokémon is now Poisoned.
Cost: Psychic, Colorless
Choose 1 of your opponent's Pokémon. This attack does 20 damage to that Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)