Stump is the main bouncer for the Skeleton Squad and knows a thing or two about keeping the squad safe. When the band isn't touring Stump teaches a spooky self-defense class, costumes are encouraged! Stump is a black Squishmallow and has triangular ears. They have a rounded skull with eye and nose cavities and two fangs protruding below. Their skull, inner ears, ribs and sternum are all electric blue.