Naruto and Inuyasha would be an interesting pairing. Naruto's positive attitude and Inuyasha's more gruff nature could create some great character dynamics. They could learn from each other's fighting styles and outlooks on life.
Sakura and Liara would make an interesting pair. Sakura, with her medical ninjutsu skills, could collaborate with Liara, who is also very knowledgeable in the medical and scientific fields. They could exchange knowledge about different forms of healing and perhaps even come up with new techniques by combining their respective medical expertise.
Naruto and Cayde - 6 would be an interesting pairing. Naruto's energetic and positive personality would contrast with Cayde - 6's sarcastic and somewhat reckless nature. They could learn from each other, like Naruto teaching Cayde - 6 about the importance of friendship and never giving up, while Cayde - 6 could show Naruto some of his cool gadgets and weapons.
Naruto and a wise, old swordsman. Naruto's energetic and determined nature would contrast well with the swordsman's calm and experienced demeanor. The swordsman could teach Naruto how to use a sword in combat, which Naruto would then incorporate into his own fighting style in a unique way.
One interesting pairing could be Naruto and Rai. Naruto's energetic and determined nature could contrast with Rai's calm and powerful vampire leadership. They could learn from each other, with Naruto teaching Rai about the value of friendship and hard work in the shinobi way, and Rai showing Naruto how to control and enhance his power in a different way. Another pairing could be Sakura and Seira. Sakura's medical skills could be useful in the Noblesse world, and she could bond with Seira over their shared sense of loyalty and protection of their friends.
One idea could be a character from the Hanyou world ending up in the Naruto universe and having to adapt to chakra. Maybe they could teach the ninja some unique fighting styles from their world in return. Another idea is a crossover of the two worlds' magic systems, like how Inuyasha's Tessaiga might interact with Naruto's Rasengan.
I think Kakashi and Riddick would make an interesting pair. Kakashi is a highly skilled ninja with a lot of wisdom, and Riddick has his own set of skills and street - smart knowledge. They could exchange ideas about combat strategies. Also, Hinata and Riddick could be an unexpected but interesting pairing. Hinata's gentle and shy nature could be a foil to Riddick's rough exterior, and she might be able to show him a different way of looking at things in the Naruto world.
Definitely Naruto and Iron Man. Naruto is this energetic, determined ninja, and Iron Man is this brilliant, sarcastic inventor. Their personalities are so different yet they could learn a lot from each other. Iron Man could be intrigued by Naruto's chakra system and try to replicate it in some way, while Naruto would be fascinated by all of Iron Man's high - tech gadgets.
Another great pairing would be Sasuke and Wolverine. They both have a dark and brooding side. Wolverine's regenerative abilities and his adamantium claws could be compared to Sasuke's Sharingan and his various ninja weapons. They might start off as rivals, but eventually come to respect each other's skills in combat. Also, they could both share stories about their past traumas and how they overcame them to become the strong fighters they are today.
One interesting pairing could be Naruto and Huey Freeman. Naruto's naivete and idealism could be contrasted with Huey's more politically aware and cynical nature. They could learn a great deal from each other. Naruto might teach Huey about the power of believing in oneself and never giving up, while Huey could introduce Naruto to the complex world of social and racial politics.
Naruto and Timmy Turner could be an interesting pairing. Naruto is all about achieving his dreams through hard work and determination, while Timmy has his fairy godparents to grant his wishes. They could learn a lot from each other. Naruto could teach Timmy about perseverance, and Timmy could show Naruto the power of imagination.