Gyarados is a dual Water/Flying-type Pokémon. It evolves from Magikarp at lv. 20. It evolves into Mega Gyarados (not yet implemented) with the use of the Mega Stone Gyaradosite. Gyarados is a serpentine Chinese dragon-like Pokémon. It is mostly blue, with a yellow underbelly and yellow 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. It has one barbel on each side of its face. The barbels are white on a female and the same color as the main body on a male. Gyarados is found in the middle of oceans. Ironically, with a large body, Gyarados haves one of the biggest difference in size/ hitbox. Its hitbox haves the same size of the box of a player ( about 2.0 blocks). That means that you can't throw a pokeball, fish or attack a Gyarados pointing at any part of its body that is not under the separation of the head and the body/ tail. The shiny gyarados is a red Gyarados.
An easter egg in pixelmon is that you can get a zombified gyarados. To get it, you must get a Magikarp. Then, throw it into lava, then retrieve it and throw it into water. This will reveal his second skin: A cooked like fish, with X s as eyes and a burnt- like skin.
NOTE: In the most recent pixelmon update you can now level up magikarp in battle as well as use rare candies to evolve him into a zombie gyarados. Also, if you repeat this process with a shiny Magikarp, the result won't be a shiny zombie Gyarados but a normal one.