Since this is a made - up title for the purpose of this question, we can only assume that Rex is likely a character in the Star Wars universe. He could be a clone trooper, as there are many clone troopers named in the Star Wars franchise. Or he could be a new, original character created specifically for this 'story' who might be a smuggler, a rebel, or even a Jedi in hiding.
Rex was originally a police dog trained for special tasks. His background involves various experiences that shaped his skills and instincts for solving crimes.
In a post - apocalyptic world, Generator Rex was on a mission. Rex was also exploring the same area. They both heard rumors of the Black Knight. When they finally met the Black Knight, he was not what they expected. The Black Knight had a code of honor. Rex was intrigued and Generator Rex was curious about his technology. They started to exchange knowledge. The Black Knight taught them some ancient combat techniques and in return, Generator Rex shared his knowledge of advanced machinery. Rex learned a lot from both of them and they became friends, vowing to protect the world together.
One possible fanfiction could be about Rex's adventures in a new, uncharted area where he discovers a strange new type of E.V.O. He has to use his powers in creative ways to deal with it and learn more about this new threat or ally.
Naruto might try to befriend the Indominus Rex. He's always been one to see the good in others, even enemies. So he'd probably approach it with an open heart. Sasuke, on the other hand, would be more cautious and likely see it as a threat to be eliminated if necessary.
A possible plot could be that the Black Knight is wrongly accused of a crime. Rex and Generator Rex are initially tasked with capturing him. But as they get to know him during the chase, they realize he is innocent. So, they join forces to find the real culprit who is actually a powerful and corrupt figure trying to frame the Black Knight to gain more power in the post - apocalyptic world.
Fanfiction about Rex and Six could also involve a mission where they are sent undercover. They have to pretend to be ordinary people in a community that is on the verge of being overrun by E.V.O.s. They need to figure out how to stop the E.V.O.s without blowing their cover, and in the process, they learn more about each other's personalities outside of the battlefield.
Oedipus Rex is neither a book nor a novel. It's a classic dramatic work that has had a significant impact on literature and theater throughout history.
Often, it portrays him as conflicted. Rex was a loyal clone, but also had loyalty to the Jedi he served with. So in fanfic, he's usually shown as being in turmoil during Order 66.