Chinchou

On the dark ocean floor, its only means of communication is its constantly flashing lights.

Positive Ion (10+): Flip a coin. If heads, this attack does 10 damage plus 10 more damage. If tails, this attack does 10 damage.

Negative Ion (10): If the Defending Pokémon attacks Chinchou during your opponent's next turn, any damage done to Chinchou is reduced by 10 (before applying Weakness and Resistance). (Benching either Pokémon ends this effect.)