Yadorā

A Hermit Crab is a small enemy in Wario Land: Super Mario Land 3 that Wario must face in his adventure to steal the treasure of the Brown Sugar Pirates. Hermit Crabs walk back and forth, stopping at platforms' edges. When they reach an edge, they withdraw into their shells and turn around. The crabs are virtually invincible when they withdraw into their shells. The crabs can only be defeated by a side tackle to their weak spot: the back; the only other way is with Dragon Wario's breath. If Wario comes in contact with any other part of their body, he will shrink to Mini Wario.

The Hermit Crabs are also immune to water; they can walk around in it without taking damage. Wario can simply touch their backs to knock them out when they are underwater.