Frank Oliver was the first Kangaroo but only had two overall appearances in Amazing Spider-Man #81 & 126...#126 showed the Kangaroo off with his "powered-up" powers courtesy of Dr. Jonas Harrow, the man also responsible for Hammerhead's hard head!...Unfortunately, the powers, not to mention Radiation poisoning, got the best of Frank and it killed him.

A second Kangaroo jumped onto the scenes in Spectacular Spider-Man #242 with a very brief humorous appearance that turned out to be a very light workout for Spider-Man...He showed up again as a member of the Legion Of Losers along with teammates Grizzly, Gibbon, & The Spot...These are definitely villains that cause only minor headaches for Spidey, but non the less are extremely entertaining!