The plot could involve the characters from Megaman Star Force and Megaman Rock coming together to face a new common enemy. Maybe they start off as strangers in different digital worlds but are brought together by some strange glitches that are affecting both their realms.
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.
Well, it could be about the two Megamans teaming up to fight a common enemy. Maybe they combine their unique abilities, like Starforce's EM Wave powers and Rock's classic weaponry, to take on a powerful villain that threatens both of their worlds.
Obviously, Megaman Star Force and Megaman Rock would be the main characters. They are the key figures from their respective series.
One possible plot could be that the characters from Megaman Star Force somehow end up in the world of Megaman X. They might initially be confused by the more advanced and often harsher environment of the X world. Then, they could team up with the characters from X to fight a common enemy that threatens both of their universes, like a powerful virus or a rogue reploid.
A likely main antagonist could be a rogue scientist who has found a way to merge the technologies from both the Megaman Star Force and Megaman X worlds in a very dangerous way. He wants to use this new power to take over both universes.
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 key element is the contrast between Rock and X. Rock is more of a classic hero from an earlier era, while X has a more complex backstory. Their different personalities often lead to interesting interactions. Another element is the merging of their worlds. Since they come from different parts of the Megaman universe, how the fanfiction writer combines their settings is important.
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.
Sigma could be the main villain. Since he is a major threat in the Megaman X series, his ambition to conquer and destroy could extend to the Megaman Star Force world once he realizes there are new forms of power and technology there. He could see the wave powers of the Star Force characters as something to be harnessed for his evil plans.
There are many interesting fanfictions about Geo from Megaman Star Force. Some might focus on his adventures beyond what's shown in the game, like his encounters with new types of EM viruses. Writers often explore his character development, showing how he grows from a regular school kid to a powerful hero.