This two-pack did away with the Robotmasters numbering, but it is part of that series. Skywarp and Thundercracker are redecos of the Starscream figure released as RM-12. These classic characters turn into F-15 Eagle jets. They were available in 2005.
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.
