Start by establishing the basic premise. Decide if it's a full - on crossover or more of a one - off encounter. For instance, if it's a crossover, you need to think about how the two universes will merge. Are there any specific events that bring Rex and the X - Men together?
Next, focus on the characters. What are their initial reactions to each other? Rex might be in awe of the X - Men's powers, while they could be both curious and cautious about his nanite abilities. You can also create new relationships between the characters. Maybe Rogue and Rex form an unlikely friendship because they both feel like outsiders in some ways.
One idea could be a crossover where Generator Rex's nanites interact with the X - Men's mutant powers in unexpected ways. Maybe the nanites start to adapt and mimic some of the mutant abilities, causing chaos and confusion among both groups.
To start a Generator Rex x Mass Effect fanfiction, look at the settings. The Mass Effect series has a very detailed and diverse universe with different planets, species, and cultures. You can place Rex in one of the well - known locations like the Citadel or Omega. Then, think about how his presence would disrupt or enhance the existing dynamics. You might also want to explore the character relationships. Rex is a young and somewhat headstrong hero, so how would he get along with Shepard? Would they be allies or would there be friction between them?
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.
One idea could be that Naruto and Rex meet in a dimension where their worlds collide. Naruto's chakra powers and Rex's nanite abilities could create some really interesting battle scenes as they team up against a common enemy, like an evil organization that wants to control both their worlds.
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.
When writing Generator Rex fanfiction, it's important to stay true to the spirit of the original show while also adding your own creativity. For character development, think about how the events in your story will change the characters. Will Rex become more confident? Will his relationships with other characters evolve? Also, proofread your work carefully to avoid grammar and spelling mistakes. This will make your fanfiction more enjoyable for readers to read.
The plot could be centered around a strange energy anomaly that pulls Rex into the Naruto world. At first, there's confusion and a bit of mistrust between them. But as they start to understand each other's powers, they realize they can help each other. They join forces to stop a group of rogue ninjas who are using some kind of stolen technology similar to Rex's nanites.
There could be a plotline where an ancient artifact is discovered that has the potential to either destroy or save both the world of Ben 10 and Generator Rex. Ben and Rex are drawn to it for different reasons. Ben thinks it could be a powerful weapon against his enemies, while Rex believes it could help him understand more about the origin of nanites. However, they soon find out that there are many forces trying to get their hands on this artifact too. They must protect it from falling into the wrong hands and also decide what to do with it in the end. This would involve a lot of action, adventure, and moral dilemmas for both characters.
First, combine the unique elements of both worlds. For example, the technology from Generator Rex and the supernatural aspects of Highschool DxD. You could have Rex's nanites interact with the devil powers in DxD. Maybe a character from DxD gets infected with the nanites and gains new abilities. This creates an interesting conflict and opportunity for character development.
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.