The Crabbot (タニッシー Tanisshī) appears in Bubble Man's stage and in the third section of Dr. Wily's castle. One shot is enough to defeat it in the normal difficult on the NES version of Mega Man 2. However, in difficult mode, the player must shoot Crabbot twice; one to remove its shell and one to finish it off. A weapon that can be aimed low helps to finish it easier.
Crabbot's Japanese name is a play of Tanishi (タニシ), term for freshwater snails from the Viviparidae family.