Rocket's Mewtwo (MODG2 150)
Flip a coin. If heads, switch the number of damage counters on Rocket's Mewtwo with the number of damage counters on the Defending Pokémon (even if it would Knock Out either Pokémon). (It's okay if 1 of the Pokémon has no damage counters on it.)
Flip a coin. If heads, the Defending Pokémon is now Asleep.