Giovanni's Machoke (42) (1st Edition) - Gym Challenge

Flip a coin. If tails, this attack does no damage to the Defending Pokémon and Giovanni's Machoke does 100 damage to itself.

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