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.
Brock has a Marshtomp that he caught as a Mudkip in A Mudkip Mission. Mudkip Eggs were seen in the episode when Old Man Swamp offered to let Brock see one hatch, and Brock accepted his offer with enthusiasm. Brock's Mudkip later evolved into a Marshtomp in A Chip Off the Old Brock.
The fin on Mudkip's head acts as highly sensitive radar. Using this fin to sense movements of water and air, this Pokémon can determine what is taking place around it without using its eyes.
In water, Mudkip breathes using the gills on its cheeks. If it is faced with a tight situation in battle, this Pokémon will unleash its amazing power - it can crush rocks bigger than itself.
The fin on Mudkip’s head acts as highly sensitive radar. Using this fin to sense movements of water and air, this Pokémon can determine what is taking place around it without using its eyes.
In water, Mudkip breathes using the gills on its cheeks. If it is faced with a tight situation in battle, this Pokémon will unleash its amazing power—it can crush rocks bigger than itself.
In a poll conducted by Nintendo of Europe, Mudkip was voted as the fans' favorite starter Pokémon, with Typhlosion and Blastoise close behind in second.
Mudkip is the subject of a popular Internet meme known as "So i herd u liek mudkipz?".