Sharpedo

Rough Skin

If this Pokémon is your Active Pokémon and is damaged by an opponent’s attack (even if this Pokémon is Knocked Out), put 3 damage counters on the Attacking Pokémon.

Darkness · Colorless · Colorless

This attack does 20 more damage for each Colorless in your opponent’s Active Pokémon’s Retreat Cost.