Cholesteron

Mario and Luigi fighting a large Cholesteron.

A Cholesteron is a strange, yellow enemy in Mario & Luigi: Bowser's Inside Story. They are found in Bowser's Body and the Cholesteroad. Instead of attacking, they serve as a punching bag to Mario and Luigi. The bros. can pound on them with Special Attacks to score points. Small Cholesterons are very weak and have little HP, however, there are much larger versions of Cholesterons that take more effort and time to beat. Cholesterons are never seen outside of Challenge Node.