What are the possible plotlines in Ben 10 x Generator Rex fanfiction?

In a fanfiction crossover, they could end up in each other's universes by accident. Ben finds himself in a world full of EVOs and has to rely on Rex to get back home. Meanwhile, Rex is intrigued by the Omnitrix and tries to figure out how it works. They face many challenges together, like dealing with Rex's old enemies who see Ben as a new target.

One interesting crossover could be their powers combining in a unique way. For example, Ben could use one of his alien forms' abilities in tandem with Rex's nanites. Maybe Heatblast's heat powers could supercharge Rex's nanite - based weapons. Another aspect could be their personalities clashing and then learning from each other. Ben, being more of a carefree hero at times, could teach Rex to loosen up a bit, while Rex's more serious and scientific approach could help Ben be more strategic in his battles.

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.

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.

At first, they could be rivals. Ben might think Rex's nanites are too unpredictable, and Rex could see Ben as a bit of a show - off with his Omnitrix. But as they face common enemies, they start to respect each other. For example, when they're both captured by a powerful villain, they see how the other fights and starts to understand their strengths.

Another plot could be that an interdimensional rift opens up, and it's causing chaos in both Ben's and Rex's worlds. They discover that the source of the rift is related to the technology of both the Omnitrix and the Nanites. Together, they journey through the rift to find the cause and close it. Along the way, they meet alternate versions of themselves and their friends, which adds an interesting twist to the story.

One idea could be that Ben and Rex have to team up to stop a new villain who has the ability to disrupt both Omnitrix - based powers and Rex's nanites. They start off not trusting each other but as they face challenges, they learn to work together.

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?

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.

It could be Ben when he transforms into Alien X. Alien X has near - omnipotent powers. He can manipulate reality on a cosmic scale. In a crossover, he could potentially use those powers to control the Nanites or even restructure Rex's powers in some way. However, he's also very difficult to control, so it's a double - edged sword.