In the fiction that accompanies the Cybertron storyline, Scrapmetal is an individual among identical Terrorcons, a singular being within a swarm of creepy crawlies. His alt-form is an interesting design in that his chest would make you think he turns into an attack helicopter, but really that chassis rests on a quartet of insectile legs. He's basically a walker tank with a slightly arachnid vibe to him. He was released in the US in 2005. In Japan, he was named Ramble and came in a variety of colors, reinforcing the swarm idea.
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.
