The trio of "Egg Beasts" released for the Maximals had a Predacon trio of redecos. These were mechanically-detailed orb-shaped keychains that turn into robots. The Predacon ones were unimaginatively named "Dark" versions of the Maximal ones. So, Dark Eggbird here is the same design as Eggbird, but cast in a darker translucent plastic.
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.
