Read more about Scraplets at: Wikipedia

Official Site: Hasbro

Scraplets are the name of several fictional character and an alien race in the various Transformers universes.

Scraplets are robot parasite. They are semi-sentient robotic lifeforms, generally about five centimetres tall. Like the Transformers, Scraplets are capable of transforming between two modes: they transform from various humanoid or animal modes to nuts or bolts.

In the comic, the Scraplets first appeared as an interplanetary cloud which a Decepticon cargo freighter passed through on its voyage from Cybertron to Earth. During the incident, the pilot of the freighter was infected by the Scraplets and involuntarily brought them to Earth along with him.

Scraplets feed on other robotic lifeforms, which makes them very dangerous to them. Scraplets generally travel in large packs in search for robots, and upon finding one, they eagerly jump onto it, fastening themselves on the robot's armour plating. Once fastened, the Scraplets release some kind of corrosive agent that both allows them to sink partly underneath the armour plating and make them impossible to remove. Using the raw materials of the host, a single Scraplet can multiply itself many times over, creating further Scraplets and rapidly overwhelming the host.

Scraplets has not been a contender in any CBUB matches.