Upgraded for 1998 is Rattrap, now in his Transmetal form. He turns into a mechanical rat complete with chromed parts. His rat mode can also convert into a wheeled rat, the circular forms that define his hind legs and hips become hubs for wheels, letting him tear into action. His whip-like tail becomes, quite literally, a whip in robot mode.
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.