Gyarados

Dragon Spark (Water)

This attack does 10 damage to each of your opponent's Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

Full Retaliation (Colorless, Colorless) 20x

Does 20 damage times the number of damage counters on all of your Magikarp.

Pulverize (Water, Water, Colorless, Colorless) 20x

If the Defending Pokémon already has at least 2 damage counters on it, this attack does 50 damage plus 50 more damage.