Another of the Operation Combination train team is Converter, who turns into an EF66 train engine. He's a redeco of Night, released the year prior. Converter was available in a boxed set with his other train pals in Japan in 1992.
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.