The He-Man and She-Ra Christmas Special is a very odd cartoon. Two earth children find themselves on Eternia and have an adventure. It's really a series of sub-plots strung together to make a short 40 minute little movie. One of the more interesting adventures is when the Monstroids get involved. In the MOTU toy line, Monstroid is a large robot monster that's part of The Evil Horde. In the grand tradition of Filmation taking liberties with the source material, instead there's a group of transforming robots called The Monstroids. Though they did later on appear as member of the Horde in a later She-Ra episode. Clearly both a take on the popular transforming robot toys at the time (obviously Transformers, but there was a few other lines as well) and maybe a little dig at the competition (we've got to stop those evil transforming robots) before the Meteorbs were introduced. I've mentioned before how much I love the bat shit crazy nature of the line in general. A random group of transforming robots showing up in a Christmas special only to be thwarted by another group of robots is a prime example of that.