Gyarados

Rarely seen in the wild. Huge and vicious, it is capable of destroying entire cities in a rage.

Full Retaliation (30+): This attack does 30 more damage for each damage counter on each of your Benched Magikarp.

Thrash (100+): Flip a coin. If heads, this attack does 30 more damage. If tails, this Pokémon does 30 damage to itself.