The Pretender Monsters combine to form Monstructor, the only combiner from the original Generation One run that wasn't available in a collected giftbox. As noted over the past few days, the inner robots of the Pretender Monsters team were released in different colors and with dinosaur shells in Japan to become DinoForce . So, by virtue of being made up of the same pieces, Monstructor and DinoKing are redecos of each other.
An Online Amateur Sketchpad