Machamp (Legendary Collection 15/110)
Pokémon Power Strikes Back

Whenever your opponent's attack damages Machamp (even if Machamp is Knocked Out), this power does 10 damage to the attacking Pokémon. (Don't apply Weakness and Resistance.) This power can't be used if Machamp is already affected by a Special Condition when your opponent attacks.

Fighting Fighting Fighting Colorless
Seismic Toss