Harley Quinn and Rey could be a popular crossover. Rey is a strong female character in Star Wars, and Harley Quinn has a very distinct personality. A fanfic could explore how Rey's determination and Harley Quinn's chaos - loving nature would interact, maybe they team up to take on a group of bad guys in a very unorthodox way.
Anakin Skywalker and Aang are quite popular. Anakin's journey from a young Jedi to Darth Vader could be paralleled with Aang's growth as the Avatar. They both have a lot of power and face internal struggles. Also, Luke Skywalker and Korra could be an interesting crossover. Luke's hero's journey could be compared to Korra's as she overcomes various challenges in her world.
Han Solo and Commander Riker are also often crossed over. Han's roguish charm and piloting skills combined with Riker's military strategy and charisma make for an exciting pairing. They could be on a mission together, trading quips and sharing their different experiences from their respective universes. Another popular crossover is between Luke Skywalker and Spock. Luke's connection to the Force and his journey to become a Jedi, compared to Spock's logical Vulcan upbringing, offers a lot of room for character development and interesting interactions in fanfiction.
Luke Skywalker and Marty McFly are often popular choices. Luke's heroism and Jedi powers combined with Marty's relatable and adventurous nature can make for great stories. Another popular combo is Darth Vader and Doc Brown. The contrast between the dark, powerful Sith Lord and the eccentric inventor can create a lot of drama and humor in a fanfiction.
Hermione Granger and Hera Syndulla are often crossed over. Hermione's intelligence and vast knowledge of magic can be paired well with Hera's leadership and piloting skills. Also, Han Solo and Ron Weasley are popular choices. Their roguish charm and sense of humor are quite comparable, and fanfiction writers like to explore how they would get along or what kind of adventures they would have together.
Popular characters for crossovers include Goku. He's known for his amazing strength and transformations, which would be fascinating in the Star Wars world. Then there's Darth Maul. His double - bladed lightsaber and acrobatic fighting style could be an interesting match for the high - flying and fast - punching Dragon Ball Z characters. Also, Master Yoda. His wisdom and unique use of the Force could interact in an interesting way with the martial - arts - based combat of Dragon Ball Z characters.
Definitely Ultraman. He is a well - known Japanese superhero, and when combined with Godzilla in fanfic, it creates a great mix of super - powered action. Also, Gamera is often crossed over with Godzilla. They are both giant turtle - like monsters in their own rights, and the crossovers usually involve some intense battles over who is the more powerful or dominant one.
Darth Vader is a character that many fanfic writers like to use. His imposing presence and dark backstory can create a lot of tension. In a star wars x star trek fanfic, he could be a formidable villain against the Star Trek heroes. His power in the Force and his ruthlessness would pose a great threat to the Federation and its values.
Kakashi is also a favorite in these crossovers. His intelligence and wide range of jutsu, especially the Sharingan, make him interesting. In Marvel, he could be like a mentor figure to some of the younger heroes, similar to how he was in Naruto. In DC, he could be an ally to the Justice League, using his skills to outwit villains. Sakura, with her medical and combat skills, can also be a great addition, perhaps working with the Avengers' medical team in Marvel or with Wonder Woman in DC.
Definitely Harry Potter and Luke Skywalker. They both are heroes on a journey to defeat great evils. They could learn from each other's experiences and powers. Harry could show Luke some of the more subtle forms of magic, and Luke could teach Harry about the Force.
Luke Skywalker and Amuro Ray would make an interesting crossover. Luke's Jedi skills and Amuro's Gundam piloting abilities could lead to some great action scenes. They could learn from each other, like Luke teaching Amuro about the Force and Amuro showing Luke the ins and outs of Gundam technology.