In Japan, 1987, Transformers went all-in on the Headmasters story concept and toy gimmick, wherein a driver or small humanoid operator would transform into the head of its vehicle or creature. In Japan you could get individual Headmaster units in boxes, including Kirk here. He turns into a robot head that can be plugged into any larger Headmaster body, called a "transtector" in the Japanese Headmaster lore.
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.
