Well, if we think about it, the Force in Star Wars has some similarities to the magic in The Neverending Story. So, characters like Yoda could potentially be in The Neverending Story as a wise mentor figure. He could teach the characters in that world about the power within them, just like he does with the Jedi. And perhaps Darth Vader could be a menacing presence, his dark side clashing with the more light - hearted elements of The Neverending Story.
One way could be to make Noble Six a new type of bounty hunter in the Star Wars universe. They could have unique combat skills and armor that would set them apart from other characters.
Perhaps Gohan could be a bounty hunter in the Star Wars fanfiction. He'd use his combat expertise to track down the toughest targets. His Saiyan tail could be a unique feature that other characters in the Star Wars universe find strange. He could get involved in the underworld of the galaxy, facing off against smugglers and criminals while also having run - ins with the Jedi and Sith.
She could be a sort of anomaly in the Star Wars universe. Scarlet Witch's powers are so distinct. In fanfiction, she might be a key to unlocking some ancient and forgotten power related to the Force. For example, her ability to manipulate probability could be translated into affecting the will of the Force in unexpected ways. She could be a catalyst for change in the power balance between the light and dark sides.
Naruto's Rasengan could be seen as a new kind of energy attack in the Star Wars universe. It could be as powerful as a lightsaber strike or a blaster bolt. Maybe only those with strong Force abilities can withstand it or deflect it, like how some Sith Lords can block Jedi attacks.
In a RWBY fanfiction, the Delta Squad could be on a mission to retrieve a valuable relic that has somehow ended up in the RWBY world. Their presence then sets off a chain of events as they interact with teams RWBY, JNPR, etc. They might initially be seen as a threat, but as the story progresses, they form alliances and work together towards common goals.
Anakin could be part of a time - travel story in a fanfiction. What if a character from Star Wars Rebels was sent back in time and met Anakin before his fall? They could try to change the course of his future, which would have a huge impact on the events of Star Wars Rebels and the entire galaxy.
It would make the story more exciting. For instance, seeing Chewbacca in the world of The Neverending Story would be really cool. His big furry presence would be something new and different. He could use his strength to help the characters in The Neverending Story with physical tasks.
You could also make the Transformers a part of the backstory in Star Wars fanfiction. Suppose there was an ancient race that created both the Transformers and the precursors to the Star Wars technology. This connection could explain some of the similarities in advanced machinery between the two universes. For instance, the idea of self - aware droids in Star Wars could be related to the sentience of the Transformers.
One way is to have Sonic as a unique alien species in the Star Wars universe. Maybe he's a super - fast courier on a planet like Tatooine, using his speed to outrun the local gangs or deliver important messages.
The characters can be incorporated by simply having them show up in the Star Wars galaxy. For example, Thor could land on Tatooine with his lightning powers, causing quite a stir among the locals. His Asgardian technology could be a mystery to the Star Wars characters.