Wimpod is a small, arthropod Pokémon. Its main body is purple and is covered by silver plating across its back. There are four plates total. The first plate covers half of its head, but leaves room for its eyes. The upper lids for its eyes appear to be covered with additional plating. The three plates on its back overlap, and each has a single black triangle in the middle. It has a long spike on each side of its head that curves backward, large yellow eyes with two short extensions over them like eyelashes, and two flat antennae that extend over its back. There are four short legs on its underside, and it has a long, prickly tail.
This Pokémon is cowardly by nature and wary of both noise and sudden movements. However, its curiosity will cause it to approach people or Pokémon that are standing still. It will spit a poisonous liquid when threatened. The stench of this fluid warns others that danger is nearby. Wimpod will eat and store anything, including garbage from the sea. This habit makes them highly valued as cleaners. When it finds coins, Murkrow and Meowth go after it.
Wimpod is the only Pokémon with a base stat total of 230.
Wimpod appears to be a combination of a trilobite and an isopod (possibly the genus Ligia). It also shares behavioral similarities with silverfish, an insect commonly known to quickly flee from anything that startles it.
Wimpod may be a combination of wimp and the taxonomic term pod (foot), such as in "isopod".
Kosokumushi may be a combination of 小 ko (small), 足 soku (feet) or 姑息 kosoku (underhanded) and 虫 mushi (bug).