Another BotCon 2007 exclusive, this edition of Overkill was available to participants of a customization class. The class instructed on how to turn this unassembled and unpainted Classics Grimlock into a version of the Generation 1 cassette, Overkill. Once completed, this Overkill turns into a Tyrannosaurus Rex. This design would be made "real" as part of a 2008 Universe toyline.
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.
