The 1987 assortment was filled with gimmicks, including sets of Autobot and Decepticon clones. The premise was that the robot modes would be "identical", but each twin would turn into a very difficult vehicle or creature. In the case of Autobot clone Fastlane, he turns into a drag racer. In reality, the limits of toy design made it very easy to spot in an instant which clone was which.
The combined form of the Universe Micromaster Aerialbots is Superion, an amalgamation of six robots plus their pack-in accessories that serve as connectors, head, and extremities of the gestalt warrior. While in Japan, the original source of the design ( Sixwing , 1992) was available in a collected set, this combiner needed to be purchased one bot at a time in the 2007 Universe release.