Bugnaughts were a kind of droid gladiator employed by the Rattataki for combat practice. A specific instance of these droids battled within the Cauldron located on Rattatak. This particular Bugnaught utilized an arm-mounted flamethrower to incinerate Carl, resulting in his death, but was subsequently torn apart by Blorga.
Asajj Ventress possessed a number of other Bugnaughts, which she used as disposable targets during lightsaber training.