Monsterous is the giant combined form of
In Axiom Nexus, Cy-Kill ran into six Predacon criminals from the Uniend Cluster and defeated their leader Fright Face in single combat, earning their loyalty. Impressed by his new troopers, Cy-Kill recreated the combination technology he once used for Puzzler, allowing the Predacons to unite and form Monsterous. Cy-Kill brought Monsterous with him back to Level 1 when he escaped from Axiom Nexus.
Cy-Kill and his new recruits emerged in the midst of an epic battle between the Guardian fleet and Roguestar. Monsterous gleefully tore through the surprised Courageous before turning on the Command Centers. Unfortunately, Leader-1 tricked Cy-Kill into firing a killing shot at him, which he dodged so that it hit Monsterous instead. This respite allowed the Guardians to retreat, but the Renegades had clearly won the day.
Cy-Kill dispatched the creature warriors to Philadelphia as Monsterous to draw Courageous out for another battle, but Monsterous was overwhelmed by a squad of Guardian Boomers. Cy-Kill brought Monsterous to an ambush to try and seize a matter transmutation ring, but the surprise appearance of Courageous made it a fair fight, and so the Renegades retreated again.
When the Guardians and UNECOM came to Quartex to sign a tri-planet alliance treaty with Boulder's Rock Lords, Cy-Kill and Magmar decided to intervene. Monsterous and Puzzler were pitted against Courageous and the Fossil Lord's Fossilsaurus until Cy-Kill tipped his hand and revealed the Renegade Power Suit Warrior, Nemesis. The forces of good rallied, however, and prepared a counter-strike. Monsterous was diverted into battle with the Action Shock Rocks, leaving Courageous and Fossilsaurus evenly pitted against Nemesis and Puzzler in the rematch.
- Monsterous (1986)
- Renegade Robot Giant
- A straight import of the Revenge of Chronos Devil Satan Six, Monsterous is formed from six smaller toys, with Fright Face and Heart Attack forming the body, South Claw and Weird Wing as the arms, and Gore Jaw and Fangs as the legs. Monsterous's components were available either individually or as a set.