An unlikely incarnation of Optimus Prime is his Go-Bots version, released in 1995. I've taken some artistic license and given Prime his proper character head, when the toy itself made no concession to its repainted design to really look like Optimus. He's basically Firecracker with a different paint job. He turns into a Lamborghini Diablo.
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.
