The collected form of the previous six 'bots -- the Protectobots merged into their combiner gestalt form of Defensor. To make this agglomeration work, you need a few extra parts that were included in the toy releases of the individual components. This design had been previously released as SixTurbo in Japan in 1992. This incarnation is the 2004 KB Toys exclusive edition.
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.
