Skuntank

Poké-PowerEvolutionary Gas

Once during your turn (before your attack), when you play Skuntank from your hand to evolve 1 of your Active Pokémon, you may choose 1 of the Defending Pokémon. If that Pokémon tries to attack during your opponent's next turn, that attack does nothing.

The Defending Pokémon is now Poisoned.

Before doing damage, discard all Trainer cards attached to the Defending Pokémon.