A bizarre design that reminds me of some of the odd body shapes I would draw when tackling the Beast Machines line, Repugnus is an Autobot scout from the Cybertron series. I honestly don't really know where his face is. He turns into a bio-mechanical spinosaurus, and comes with a Animatron Cyber Planet Key (the Jungle Planet) that unlocks a pop-out switchblade like weapon from his crest. He was available in 2006.
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.
