Maybe in the fanfiction, Mega Man and X find out they are from parallel universes and have to figure out how to get back to their own worlds while also dealing with threats in the new combined universe. They could learn new abilities from each other during this process.
One idea could be that Mega Man and X team up to face a new, extremely powerful enemy that neither could defeat alone. For example, a virus that can adapt to their attacks instantly.
Perhaps in the fanfiction, Mega Man and Mega Man X meet in a virtual world created by a mad scientist. The virtual world is filled with distorted versions of their old enemies. They have to work together to find the core of this virtual world and shut it down. Along the way, they share their experiences and upgrade each other's abilities, leading to a new and more powerful form for both of them when they finally face the scientist.
One possible plot could be that the characters from Megaman Star Force find themselves in the world of Megaman X. They could team up to fight a new common enemy that is a threat to both their worlds. Maybe a powerful virus that is corrupting the cybernetic systems in both universes.
One idea could be that Megaman X somehow gets transported to the Loud House world. He could team up with the Loud siblings to fight a new kind of virus that is affecting both the digital world he comes from and the real - world of the Loud House. For example, the virus might be making the electronics in the Loud House go haywire and also infecting some digital creatures that have found their way into the real world.
One idea could be a time - travel plot where Megaman X and Roll.EXE are sent to a different era in the digital world. They have to adapt to new rules and enemies while trying to find a way back. Another could be a story where Roll.EXE gets infected by a virus and Megaman X has to find a cure without harming her.
Well, in Rock meets Megaman X fanfiction, a cool concept is the exchange of technology. Rock might learn about X's advanced weapon systems and try to incorporate some elements into his own arsenal. And X could gain some insights from Rock's more simplistic yet effective combat style. Also, a story could be built around Rock trying to understand the complex society of Reploids that X is a part of, and how he navigates through it to help X in his fight against Mavericks.
One idea could be that Megaman X and Nana team up to fight a new powerful enemy that threatens their world. They could combine their unique abilities to overcome various obstacles during the battle.
One plot idea could be that the Virus X starts to infect the digital world in unexpected ways, causing glitches in the Megaman universe. For example, it could make some of the usual power - ups work in reverse. Another idea is that a new character is created as a result of the Virus X's influence and has to choose between helping the Virus or fighting against it. And a third plot idea might be that the Virus X targets Megaman's closest allies, forcing him to go on a rescue mission while also trying to find a cure for the infected.
In the 'megaman rock meets x fanfiction', it could be a story centered around a crisis that only Rock and X can solve together. For example, a virus that is spreading across both of their timelines. Rock with his determination and simple yet effective weaponry, and X with his adaptability and powerful upgrades, must combine their strengths. Along the way, they might also meet other characters from their universes and have to convince them to support their cause in this cross - over adventure.
One idea could be a story where Bass and Roll are forced to team up to face a new, powerful enemy that neither could defeat alone. They start off distrusting each other but gradually learn to work together and respect one another's skills.
There could be epic battles. Maybe the characters from Megaman Starforce and Megaman X would team up to fight a powerful common enemy. They might combine their unique abilities, like the Starforce's EM Wave powers and X's advanced weaponry.