Stunfisk

It conceals itself in the mud of the seashore. Then it waits. When prey touch it, it delivers a jolt of electricity.

Muddy Water (20): Does 20 damage to 1 of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

Rumble (40): The Defending Pokémon can't retreat during your opponent's next turn.