Mega Gyarados Water / Dark Japanese Name: MegaGyarados Height: 6.5m / 21'04'' Weight: 305kg / 672.4 lbs. Classification: Atrocious Pokemon Ability: Mold Breaker Revealed: Mega Gyarados was officially revealed by Pokemon.com following the release of X & Y. Mega Gyarados receives notable stat boosts to its Attack, Defense, and Sp. Defense stats, as well as a minor boost to its Sp. Attack. HP: 95 Attack: 155 Defense: 109 Sp. Attack: 70 Sp. Defense: 130 Speed: 81 Mega Stone: Gyaradosite. X/Y: Couriway Town, post-game. OR/AS: Route 123, in the mouth of a Poochyena. Mega-Evolves from Gyarados.