Bone Thwomp

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The title of this article is conjectural; an official name for the article's subject has not been found, so it has been given a fitting title by the editors. If an official name appears that is not from the English Super Mario Bros. Encyclopedia, it is requested that the article should be moved to the correct name.

Mario and Luigi near a Bone Thwomp

A Bone Thwomp is a species of Thwomp that acts as a bone in Bowser's body in Mario & Luigi: Bowser's Inside Story and its remake. They appear throughout the Pump Works. Bone Thwomps are more of an obstacle than an enemy, blocking Mario and Luigi's path. If Bowser drinks water, Bone Thwomps will float, allowing the bros. to proceed. This enemy reappears later in the Airway, but they are shorter, and plumper. They are used as stepping stones to access higher ground.