Devil's Due G.I. Joe vs Transformers continuity
Some time prior to 1978, in the Himalayan Mountain region of Tibet, Bludgeon led the soon-to-be Pretender Monsters to meet with the underground kingdom of Cobra-La, seeking power and a ringside seat at the death of a planet. En route, they were shot down and damaged by the Chinese Air Force, however, forcing Bludgeon to make a deal with Cobra-La: in exchange for defending Cobra-La's subterranean domain, Cobra-La provided them with life-supporting organic Pretender shells.
Later, when G.I. Joe sent an invasion force against Cobra-La, they merged into Monstructor to repel the invaders. Monstructor wreaked havoc on the Joes but was defeated when the laser squad blew up his head, leaving his component members in an unconscious heap.