Its crest is larger and black, and its barbels also gain considerable length. The fins on its cheeks become longer and gain a yellow tint. When it Mega Evolves, Gyarados becomes bulkier. However, Gyarados is rarely seen in the wild.
Both Gyarados and its Mega form have demonstrated in the anime that it can leap huge distances both from the water and from the ground, usually several times its own body length. Gyarados lives in both fresh and salty waters. Its rampages have been known to last a month at a time. It appears in times of conflict and destroys the surrounding area. Gyarados is feared for its fierce temper and wanton destructive tendencies. Gyarados's fangs can crush stones and its scales are harder than steel. The process of evolution causes a change in its brain structure that is believed to cause its violent nature. Gyarados's tail fin is similar in structure to the crest on its head, except with a thin, white fin spread between the points. It has small, red eyes, a three-pointed, dark blue crest on its head, and four white, spiky dorsal fins. The barbels are white on a female and tan on a male. It has one barbel and a small white fin on each side of its face. Its mouth is very large and gaping, bearing four pointed teeth and yellow lips. It is mostly blue with a yellow underbelly, and it has a row of yellow spots down each side. Gyarados is a serpentine Pokémon with a long body covered in slightly overlapping scales. 6.7.6 By transfer from another generation.3.9 Pokémon Gold & Silver: The Golden Boys.3.8 Pokémon Diamond and Pearl Adventure!.3.5 Pocket Monsters HGSS Jō's Big Adventure.Gyarados can Mega Evolve into Mega Gyarados using the Gyaradosite. It evolves from Magikarp starting at level 20. Gyarados ( Japanese: ギャラドス Gyarados) is a dual-type Water/ Flying Pokémon introduced in Generation I.