DugtrioダグトリオUnlimited

Poké-BodySinkhole

If your opponent's Active Pokémon retreats, put 2 damage counters on that Pokémon.

Your opponent switches the Defending Pokémon with 1 of his or her Benched Pokémon.

Does 10 damage to each Benched Pokémon (both yours and your opponent's). (Don't apply Weakness and Resistance for Benched Pokémon.)