Gyarados is a large dragon Pokémon, resembling dragons seen in Chinese mythology. Its serpentine body is mostly blue (red since it is shiny), but its underbelly is yellow, as well as the spots along its body. It has a three-pointed, dark blue crest on its head and four white fins down its back. Its mouth is very large and gaping, bearing four canine teeth, but bears some resemblance to that of its pre-evolution Magikarp. Like Magikarp, it has one barbel on both sides of its face. Its pectoral and dorsal fins also resemble Magikarp's. Gyarados is rarely shown with its mouth closed.
A female has white barbels, while a male has blue (or in this Gyarados' case, red).
Gyarados, like most dragon-like Pokémon, has a high Attack stat, causing it to rely more on physical attacks than special ones. It is one of the few Water-types able to wield both Fire-type and Electric-type attacks. Its fangs can crush stones and its scales are harder than steel.
It's Moxie ability allows it's Attack power to rise when it causes a Pokémon to faint with direct damage.