Once during your turn (before your attack), if Dark Crobat is your Active Pokémon, you may choose 1 of the Defending Pokémon. That Pokémon is now Poisoned. This power can't be used if Dark Crobat is affected by a Special Condition.
Does 10 damage to each of your opponent's Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.) Remove from Dark Crobat a number of damage counters equal to the number of your opponent's Pokémon in play.