Rocket's Meowth.

Search your deck for a Pokémon Tool card or Rocket's Secret Machine card, show it to your opponent, and put it into your hand. If you do, you may switch Rocket's Meowth with 1 of your Benched Pokémon. Shuffle your deck afterward.

Flip a coin for each Pokémon in play (both yours and your opponent's). This attack does 10 damage times the number of heads. Rocket's Meowth does 10 damage times the number of tails to itself.