Marshtomp is an amphibious bipedal Pokémon. Its body is primarily light-blue with a lighter shade of blue for its underside and an orange belly. Marshtomp's head has an angular black fin, orange eyes, and orange gills on the ends of both cheeks. It has long arms with three-fingered hands. Its feet have three small toes, and it has two black fins for tails. This Pokémon has a thin, sticky film enveloping its body that enables it to live on land. Its body weakens if its skin dries out, so it plays in the mud on beaches when the tide is low to replenish fluids. It is capable of moving faster through mud than water. With its sturdy legs, it has good footing in mud that allows it to overwhelm struggling opponents. As its former signature move, Muddy Water is another special capability of this Pokémon. Marshtomp lives in swamps and other wetlands.
Brock's Mudkip evolved into a Marshtomp in A Chip Off the Old Brock. The Mud Fish Pokémon accidentally injured a Flaaffy. After the Flaaffy was healed, Marshtomp became infatuated with the pink electrical sheep, though it ultimately rejected him. Marshtomp remained on Brock's team until it was left in Pewter City he departed for Sinnoh.
Marshtomp, the Mud Fish Pokémon, is the evolved form of Mudkip. Its body is enclosed in a membrane allowing it to live on land. Its lower body is well developed, so it's capable of walking on two legs.
Advanced Generation series entries continue below.
Ruby's Mudkip, Mumu, evolved upon his arrival at Slateport City, which Ruby was happy to record a video of. Afterwards, it was used in battle with Magma AdminBlaise as Ruby escaped the villain using his knowledge of Pokéblocks and Natures that determine preference. After again being forced to battle with yet another Magma Admin, this time in the form of Courtney, it became a Swampert, though this time Ruby was too depressed after his fight with Sapphire to commemorate this occasion.
Marshtomp is based on the mudpuppy or mudskipper. It may also be based on the axolotl, like its pre-evolved form. The single fin on Marshtomp's head is reminiscent of the Murmillo helmet worn by murmillo-class Roman gladiators or the Corinthian helmet (with a horsehair crest) which is worn by Greek Hoplites. "Murmillo" is also a Greek word for a type of saltwater fish.