Weezing

Liability: Put damage counters on the Defending Pokémon until it is 10 HP away from being Knocked Out. Weezing does 70 damage to itself.

Smogscreen (20): The Defending Pokémon is now Poisoned. If the Defending Pokémon tries to attack during your opponent's next turn, your opponent flips a coin. If tails, that attack does nothing.