Poliwrath

If Poliwrath is your Active Pokémon and is Knocked Out by damage from an opponent's attack, the Attacking Pokémon is now Confused.

If the Defending Pokémon is a Darkness Pokémon or has Dark in its name, this attack does 40 damage plus 30 more damage.

If the Defending Pokémon is a Stage 2 Evolved Pokémon, this attack does 60 damage plus 30 more damage.