As long as Slowking is your Active Pokémon, whenever your opponent plays a Trainer card (excluding Supporter or G-SPEC), he or she flips a coin. If heads, that card does nothing. Shuffle the Trainer card played into its owner's deck. This power can't be used if Slowking is affected by a Special Condition.

Flip a coin. If heads, this attack does 20 damage plus 10 more damage and the Defending Pokémon is now Confused. If tails, this attack does 20 damage.