89P13 is a genetically enhanced furred animal turned freelance criminal, calling himself Rocket. Alongside his friend and partner Groot, Rocket traveled the galaxy picking up bounties until they met Star-Lord who then convinced them to assist him to sell the Orb for a massive project. However as it was discovered that the Orb was one of the Infinity Stones which was being sought out by Ronan the Accuser, Rocket was convinced to risk everything to stop Ronan's plans to destroy Xandar and enslave the world. During the ensuing conflict, Rocket managed to assist his friends in destroying Ronan, despite Groot seemingly being killed. He then became a member of the Guardians of the Galaxy alongside the newly planted baby Groot.
Rocket continued working with the Guardians when they were hired by the Sovereign to slay the Abilisk, however Rocket took the job as a way to steal Anulax Batteries to sell. This angered Ayeshawho declared war on the Guardians, hiring the Ravagers to capture them. Rocket and Groot were soon captured by Taserface, who had taken command from Yondu Udonta, which forced Rocket and Udonta to work together to break free and kill Taserface. During his time with Udonta, Rocket learned how to be a better person and understood how much he loves his Guardians family, so he joined the fight against Ego, the father of Star-Lord, losing Udonta during the battle.
He and Groot can be seen in the Oasis Nightclub.