Elekid

Pokémon Power: Playful Punch Once during your turn (before your attack), you may flip a coin. If heads, do 20 damage to your opponent's Active Pokémon. (Apply Weakness and Resistance.) Either way, this ends your turn. This power can't be used if Elekid is Asleep, Confused, or Paralyzed.

If this Baby Pokémon is your Active Pokémon and your opponent tries to attack, your opponent flips a coin (before doing anything required in order to use that attack). If tails, your opponent's turn ends without an attack.