Mudkip

Mudkip is a Water-type Pokémon.

It evolves into Marshtomp starting at level 16, which evolves into Swampert starting at level 36.

Biology
Mudkip is a small, amphibious, quadrupedal Pokémon. It has a blue body with a light-blue underside. Mudkip has a large head with a blue fin on top and a light-blue tail fin. It has black, beady eyes and orange, star-shaped gills on its cheeks. By using the fin on its head, Mudkip can detect changes in air and water currents as well as bodies of water. Its fin can also point in a certain direction, as seen in the anime. Mudkip is capable of moving or crushing boulders larger than itself. Its large tail fin provides powerful acceleration to propel it through the water.

According to its Pokémon Ranger browser entry, Mudkip is a very docile Pokémon. Mudkip is more commonly found in captivity, though it can be found in swamps and other wetlands. In the wild, it sleeps by burying itself in the soil at the water's edge.