Nobody is completely sure where the Scrapmetal came from or how they got to be in their current state. Most posit they're a breed of mechanical vermin from Cybertron's lower levels that have been mutated by the effects of the Unicron Singularity. Others think they're the results of ancient cloning experiments by insect-like warriors from a bygone era. Red Alert theorized that they're from another world swallowed by the Grand Black Hole, moving from planet to planet, devouring everything in their path. Whatever their origin, their current state is painfully clear; there are thousands of Scrapmetal crawling in and on Cybertron, devouring any robot unfortunate enough to cross their path.