Originally an Autobot hero from the Great War, Megatronus Pax was led to the Dead-End of Polyhex on Cybertron and saw the amount of Empties that wore the Decepticon badge. He found a secret gladiatorial ring in the Decepticon capital of Kaon and rose up to the rank of champion, soon coming across the Badge of the Decepticons, the counter for the Matrix, and stole it for himself. He arranged for a few Decepticons to escape the Stockade and stole a ship, the Harbinger, and made his way to Earth, now Mobius. Eventually, Optimus discovered Megatronus’ new allegiance and position as the new Decepticon Supreme Leader. With that title and position came a new name, Megatron, Lord of the Decepticons and Master of Dark Energon, Optimus’ main nemesis. Because of his use of Dark Energon, it leaves him looking almost corpse-like, despite being still very active.