Birdbrain is next in the line of Decepticon Pretender Monsters. His outer bird monster shell conceals his inner robot, that turns into beaked mechanical monster. Birdbrain was available in 1989. That same year, his robot body was redecoed to be the DinoForce soldier Rairyu.
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.
