Slugfest is as lumbering and dim-witted as he looks. The Decepticons can only count on him to do the simplest of tasks, which means he's usually limited to carrying messages in his cassette mode. This arrangement would be fine if Slugfest wasn't so nosy. Invariably, he plays back the messages for himself before he delivers them, and then misinterprets them to be about himself. This sends him into violent rages, since he hates when others talk behind his back. At such times, he attacks anyone and anything, friend or foe. Only force or lack of fuel stops him. Very often the end result of one of these tantrums is the inadvertent destruction of the message he carries, as well as any small towns that happen to get in the way.