Crustle

Crustle is a /-type Pokemon and evolves from Dwebble.

Appearance
Crustle is a red and brown colored pokemon and on the bottom of the dirt pile is a hermit crab. On the "shell" of Crustle are alternating light and dark brown stripes.

Origin
It is most likely based on a hermit crab but it has a chunk of rock on its back instead of a shell.

Trivia

 * Its English name appears to be a combination of "crust" and "mantle", which are the first two layers of the Earth's surface.
 * It's possible that it could be "castle" as well.