Skelita Calaveras debuted in the cartoon series in the Volume 3 TV special "Scaris: City of Frights", which premiered on March 3, 2013. She is voiced by Laura Bailey in the English version of the cartoon.
Hackington has his students, among which Skelita, bring their most precious possession to school and give a presentation about it. Skelita chooses to talk about her necklace, which is a centuries' old heirloom passed down along the female line. Her presentation is so moving that it even impresses Heath and Manny.