Read more about Gnaw (Sharkticon) at: Wikipedia

Official Site: Hasbro

Sharkticons are fiction robot from the Transformers universe.

The ravenous Sharkticons, the most famous and deadly of the Quintessons' slaves, are rotund robots capable of transforming into ferocious, amphibious creatures. They carry out the Quintessons' sentences, consuming victims dropped into their pit, and are also used for performing commando style raids and missions, though their limited intelligence meant that tasks entrusted to them were generally simple.

A Sharkticon action figure was released under the name "Gnaw" that same year, nominally categorized as a Decepticon. Although the same as the numerous legions of Sharkticons seen in the movie, the Transformers toyline was not ready for characterizations of a toy as one of many (unlike a Cobra Viper figure from the G.I. Joe line representing an untold number of Viper troops). The character Gnaw appeared in Dreamwave Productions's Transformers comic in 2004, as a companion of Wheelie. His origins, most likely those of a defected or reprogrammed Quintesson advanced agent, were left up to speculation.

In The Transformers: The Movie, Gnaw was the given individual name of an army of Sharkticons seen on the planet Quintessa that captured Hot Rod and Kup. He was intended to be a generic Sharkticon soldier. As minions of the Quintessons, the Sharkticons served as "executioners" in Quintessa's high court, devouring whatever being falls into their pit after the Quintessons declare them "innocent". When the Quintessons sentenced Hot Rod and Kup to the Sharkticon pit, the two Autobots managed to defeat the Sharkticons by transforming into their car modes and creating a whirlpool in the pit. Further intimidation by Grimlock influenced the Sharkticons to revolt against their Quintesson masters.

Gnaw (Sharkticon) has not been a contender in any CBUB matches.