Slowking

When its head was bitten, toxins entered Slowpoke's head and unlocked an extraordinary power.

Pokemon Power — Mind Games: Whenever your opponent plays a Trainer card, you may flip a coin. If heads, that card does nothing. Put it on top of your opponent's deck. This power can't be used if Slowking is Asleep, Confused, or Paralyzed.

Mind Blast (20+): 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.