A Stage 1, GX Pokemon Card of type Water with the title Gyarados-GX and 230 HP of rarity Promo evolved from Magikarp from the set SM Black Star Promos.  It has the attack Dragon Rage with the cost Water, Water, Water, Colorless, the energy cost 4 and the damage of 130. It has the attack Hyper Beam-GX with the cost Water, Water, Water, Colorless, the energy cost 4 and the damage of 240 with the description: (You can't use more than 1 GX attack in a game.) It has weakness against Lightning 2. 
Gyarados-GX