Naruto and Finn are often paired. They are both the main protagonists in their respective shows and have a lot of similarities. They are brave, determined, and always looking for adventure. Their combined energy would make for an exciting story.
I think Sakura and Princess Bubblegum would also be a great pair. Sakura is strong - willed and intelligent, and Princess Bubblegum is a scientific genius. They could exchange knowledge and skills, like Sakura teaching Bubblegum some medical ninjutsu and Bubblegum showing Sakura some advanced scientific concepts from the Land of Ooo.
Sasuke and Marceline can be a popular pair. Sasuke has his dark and brooding nature, while Marceline is a bit of an outsider with her vampire powers. Their personalities could create an interesting contrast and story arc as they interact with each other.
Often, Naruto and Agent 47 are paired as they are the main characters from their respective universes. Their interactions can be really interesting as they come from such different worlds. Naruto's exuberance and Agent 47's cold, calculated nature create a great contrast.
Often, Naruto himself is a popular character to pair with characters from Ravel's world. His strong will and determination make him an interesting addition to any crossover story. Another popular pairing could be Sasuke from Naruto with a powerful character from Ravel. Their brooding natures and strong powers can create an interesting dynamic.
Homer and Jiraiya might be a fun pair. Homer loves food and Jiraiya loves women and writing. They could go on adventures together, with Homer being amazed by Jiraiya's ninja powers and Jiraiya being entertained by Homer's simple - mindedness. And they could get into all sorts of trouble, like accidentally stumbling upon a secret enemy base while looking for a good place to eat or write.
Definitely Naruto and Bayonetta. Naruto's never - give - up attitude and his growth from an outcast to a hero can be a great foil to Bayonetta's already established badassery. Another pair could be Kakashi from Naruto and Bayonetta. Kakashi's intelligence and experience combined with Bayonetta's raw power could lead to some exciting adventures in fanfiction. Plus, his Sharingan might have some interesting interactions with Bayonetta's magic.
There are also those that pair Sakura from Naruto with Moana. The two strong - willed female characters can bond over their goals and face challenges together in the fan - created stories.
Kakashi is another character that is popular to pair with Naruto. His laid - back yet extremely knowledgeable and powerful nature makes for great interactions with Naruto. As for Reggie, if there is a rival character in his story, that rival could be a popular pairing in fanfiction. The rivalry between them can drive the plot forward, just like how Kakashi's presence often pushes Naruto to grow in different ways.
Elena is a very popular character to pair with Damon in time travel fanfiction. Their complex relationship in the original story makes it interesting to explore how it could be different if they were able to travel through time together. Another popular pairing is with Bonnie. Her witch powers could play an important role in the time travel aspect, and their friendship or potential romantic relationship can add depth to the story.
Naruto and Eleven are often popular to pair. Naruto's determination and Eleven's powerful abilities make for an interesting combination. They could learn from each other and fight together against common enemies.
Naruto and Medaka are often paired together. Their different personalities and powers make for an interesting dynamic. Naruto's energetic and determined nature contrasts with Medaka's more composed and all - powerful self.
Another often - seen pairing is Sakura and Twilight Sparkle. Sakura is a strong - willed and intelligent character in Naruto, and Twilight is the same in Equestria Girls. They could bond over their love for knowledge, with Sakura sharing her medical ninjutsu knowledge and Twilight sharing her magical research. Also, they could support each other in facing challenges that require both physical and magical skills.