Well, aside from X and Zero which are obvious choices, Vile is also quite popular in Mega Man X fan fiction. His ruthless and powerful nature gives a lot of room for interesting storylines. Axl is another character that fans like to include. He has a unique ability and his own story arc that can be expanded upon in fan - created stories. Also, some of the more unique Mavericks like Storm Eagle or Flame Mammoth are often used as they have distinct personalities and abilities that can create engaging scenarios in fan fiction.
X and Zero are definitely the most popular. X is the main protagonist and his journey of growth and discovery makes for great fan fiction. Zero, with his cool appearance and combat skills, is also a fan favorite. Another popular character is Sigma. He's the main villain, and exploring his motives and backstory can add depth to a fan fic.
Mega Man himself is obviously a very popular choice. He's the main character, after all. Also, Proto Man often makes an appearance. His mysterious nature and complex relationship with Mega Man add depth to the story. Dr. Wily is another popular character. He can be the main villain or sometimes even an anti - hero in some fanfictions.
Definitely Mega Man and Samus are the most popular. They are the main protagonists of their respective series, so it's natural that they take center stage in the crossovers. Their contrasting yet complementary abilities make for great storylines.
Naruto and Mega Man themselves are often the most popular crossover characters. Since they are the main protagonists of their respective series, fans love to see how they interact. Another popular one could be Rockman (Mega Man) interacting with Sasuke. The contrast between Rockman's more robotic and logical nature and Sasuke's brooding and power - hungry personality can create some interesting dynamics.
Bell Cranel is definitely one of the most popular. As the main character in the original, he has a lot of potential for different storylines in fan fiction. His growth and relationships are often explored further.
In Firefly fan fiction, Zoe Washburne is quite popular. Her loyalty to Mal and her combat skills make for great storylines. Also, Simon Tam is a common feature. His journey to protect his sister River and his role as a doctor on the ship give writers a lot to work with. Additionally, Shepherd Book is often in fan fictions. His mysterious past and moral guidance on the ship are interesting aspects that writers like to expand on.
Definitely Peter Venkman. He's the witty and sarcastic one. His character provides a lot of humor and charm in the stories. Writers can easily create interesting dialogues and situations for him.
Simon Belmont is definitely a popular choice. He's the classic vampire hunter with his whip and strong will, and there are so many adventures that can be written about him. Alucard is also a fan favorite. His complex character, being half - vampire half - human, gives a lot of room for exploration in fan fiction.
Soma Schicksal is a favorite among many fans for fan fiction. His mysterious background and his powerful God Eater abilities can be used to create exciting stories. Writers might explore his connection to the Aragami or his relationships with his comrades in a fan - created narrative.
Michael Scott is also a top pick. His over - the - top personality and his often misguided attempts at leadership can be the basis for a lot of humorous and heartwarming fan fiction stories.
Marty McFly is definitely one of the most popular. He's the main character in the movies, so fans love to write more about his adventures. Doc Brown is also very popular. His eccentric personality and brilliant mind make him a great character to explore further in fan fiction.