You know the whole thing about certain characters having arch nemeses is often a marketing thing anyway. What more often happened in reality was that we just lumped whichever Goodie with whichever Baddie because it's a case of whatever toy was available to us, and often we'd go beyond the confines of pre-established canon and allow toys from different brands crossover. If we want to include a dinosaur that eats force field dogs for breakfast then that's exactly what we did.

Come on... how many of us put Decepticon Cassettes into Blaster's chest in 1985 because Autobot Cassettes didn't even exist? I know I did.