Undercover Elephant made a cameo in the "Agent Penny" segment of the Sheep Dogs/Agent Penny/Spooks-a-Poppin' (1993) episode of 2 Stupid Dogs (1993).
Reruns of Undercover Elephant were shown as one of the fillers for the adaption of Wake, Rattle & Roll (1990).
As with many Hanna-Barbera shows of the time, Undercover Elephant was a regular segment of the an anthology series "C B Bears (1977)". Other segments airing were: "C B Bears"; Blast-Off Buzzard (1977); Heyyy, It's the King! (1977); Posse Impossible (1977); and Shake, Rattle and Roll (1977). Each cartoon riffed on a popular television show or film - Undercover Elephant parodied "Mission: Impossible".