Though his shoulder bears a Decepticon symbol, Axer is more of an unscrupulous, unaffiliated bounty hunter. As an Action Master, he doesn't transform but he does have some body details suggesting he was a car at some point. Axer drives his Off-Road Cycle, which turns into a gun emplacement. He was available in 1990.
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.