Generations: Gyarados 23-83 - Rare Stage 1 Pokémon Evolves From: Magikarp HP130 Berserker Splash80 This attack does 10 damage to each Benched Pokémon (both yours and your opponent's). (Don't apply Weakness and Resistance for Benched Pokémon.) Aqua Tail90+ Flip a coin for each Water Energy attached to this Pokémon. This attack does 30 more damage for each heads.