An Autobot who was old even before he took the slow route back from the beginning of another universe, Kup is an ornery old codger and follower of Optimus Prime. Since the Revolution incident, he's taken to adventuring with his young human pal, Action Man, who has yet to get tired of his stories.
While on Earth, Kup was one of the Autobots who joined the forces of Skywatch, led by Spike, in responding to a zombie infestation; though he was able to send the zombie forces back to the beginning of time in the barren Dead Universe through his connection to their leader, Britt, he was pulled through along with them and believed dead. In actuality, he was left half-alive in the Dead Universe for eons, until being found by the villainous Nova Prime, who converted his body into a spacebridge through which the corrupt Prime planned to return to his home reality. Kup was rescued from Nova by Optimus Prime, Rodimus, and Cyclonus, who managed to find them another route home.
Six months afterwards, Kup would once again join Optimus on Earth, aiding him against the alliance between the Earth Defense Command and the Decepticons, and working with the Wreckers in dealing with Tarantulas and Mayhem.
During the Ore-13 crisis, Kup and Aileron investigated the remains of Mount Olympus; while returning, however, they were ambushed by the transforming vehicles of M.A.S.K., who captured Kup, though Aileron was able to escape. Kup was subsequently liberated from G.I. Joe headquarters on Governor's Island by Ian Noble, the Action Man, who the old 'bot took an immediate liking to. Together, they drove to Monument Valley, and participated in the final battle against the enerchanged Baron Karza-Dire Wraith hybrid.
Subsequently, Pauline Bestley brought Kup into the Action Man Programme as an outside contractor. Action Man and Kup would continue working together, including the investigation of the Talisman in Schleteva; after Ian was teleported away by Major Bludd, Kup was eager to attack the Section Sabine moonbase and rescue his human pal.
- Kup at the TFWiki