Mayhem (Earth-1984)

Mayhem is a Cybertronian anarchist group dedicated to bringing down the 'ruling class' of both the Autobots and Decepticons. They were given advanced Earth beast modes by Tarantulas, which helped them disguise without being detected.

Trivia

 * Mayhem's advanced form of transformation is similar to that of Eukarians, with the exception that their mass-shifting is powered by obtenteum.