Rumbler is from the European continuation of the Generation One line through additional Action Masters. He was part of the Action Master Exo-Suit assortment. While Rumbler didn't transform (his body details suggest he was a jet in past life), his 4WD All Terrain Vehicle he drove did, and could form a suit of exo-armor that he'd fit within. Rumbler was released in European markets in 1991.
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.
