Grimlock is the most fearsome and powerful Dinobot. Although dedicated to the Autobot cause, he resents authority. He is a valiant warrior, but is also cold and merciless with contempt for the weak, including all humans. He has great strength and his jaws can break almost anything in two. He carries an energy sword and galaxial rocket launcher in Dinobot mode.Other than arrogance and lack of speed, he has no real weaknesses.
Grimlock appeared in the following 24 comic books: