The mighty Megatron underwent the Transmetal upgrade in 1998, turning his organic Tyrannosaurus Rex shell into a mechanical one worthy of tussling with the Dinobots of old. As with the other Transmetal toys, Megatron has a third "vehicular" mode, but in this case it involved the T-Rex popping out roller blades for feet and turbine engines from his hips.
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.