One popular fanfiction might be those that explore the relationship between the original Megaman and Megaman X in different timelines. For example, a story could focus on how X was created based on the original Megaman's design, and how their powers and abilities compare and contrast.
I don't know. It could be based on real-life experiences, but it might also be completely made up. Without more information, it's difficult to determine if it's a true story.
Dr. Wily could be the main villain. He might have found a way to travel through time or dimensions to the world of Mega Man X. He then uses his knowledge of Mega Man's weaknesses and combines it with new technology in the Mega Man X world to create even more powerful and devious robots.
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.
It contributes by expanding the lore. Fanfictions can create new backstories for Protoman and Megaman, filling in gaps that the official games might not have covered. For example, their relationship before a certain event in the game timeline can be explored.
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.
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.
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.