Definitely Sasuke and Rick. Sasuke, with his brooding nature and thirst for power, would be both intrigued and threatened by Rick. Rick might see Sasuke as a good subject for some of his experiments. As for Morty, he could form an unlikely friendship with Shikamaru. Shikamaru's laid - back but intelligent nature could balance out Morty's clumsiness and fearfulness.
Rick and Kakashi would have an interesting interaction. Kakashi would be very cautious around Rick, seeing him as a potential threat with all his unknown technology. Rick would probably find Kakashi's Sharingan fascinating and might try to figure out how to replicate it. Morty and Naruto would also be a great pair. Naruto's positive attitude would be a contrast to Morty's often negative and scared self.
Definitely Rick and Brock Samson. Brock is used to being the tough guy, but Rick's unpredictable and often dangerous nature would put Brock on edge. It would be like a battle of wills. Also, Morty and Dean could have some great interactions. They both are kind of the sidekicks in their respective shows and could bond over their insecurities and the crazy things they've been through with their 'mentors'.
Rick and Dipper would be really interesting. Rick's cynical and scientific view would clash with Dipper's curious and somewhat naive nature. Dipper would be both fascinated and a bit intimidated by Rick's intelligence and his access to other dimensions. Rick might see Dipper as a young, impressionable mind that he could either corrupt or mentor in a strange way.
Rick would be the most interesting. His unpredictable nature and vast scientific knowledge would create a lot of chaos and new possibilities. He could mess with Naruto's world in ways that no one else could, like creating new types of jutsu through his technology or transporting Naruto to bizarre dimensions.
Rick and Grunkle Stan would be really interesting. They're both kind of cynical in their own ways. Rick could be dismissive of Stan's 'hustles' at first, but then they might find common ground in their experiences dealing with the strange and unknown. They could end up swapping stories about the weird things they've seen in their respective universes.
Naruto and Rick are quite popular. Naruto's positive and determined nature contrasts with Rick's cynical and intelligent personality. Their interactions can lead to really interesting storylines, like when Naruto tries to understand Rick's complex technology and Rick is bemused by Naruto's unwavering belief in his friends and his ninja way.
Definitely Naruto and Buster Moon. Naruto's bold and adventurous nature would clash and also blend well with Buster's ambitious and creative side. Buster would be fascinated by Naruto's ninja abilities and Naruto would be excited about Buster's show - making skills. They could come up with some amazing and out - of - the - box ideas for a performance in the Sing world.
One of the most interesting interactions could be between Sasuke and Zoidberg. Sasuke is this brooding, powerful ninja, and Zoidberg is this clumsy, loveable lobster - doctor. Sasuke might be initially disgusted by Zoidberg's appearance but as he gets to know him, he realizes that Zoidberg has a good heart. Zoidberg, on the other hand, would be in awe of Sasuke's power. Also, Hinata and Amy could have a really sweet interaction. Hinata is shy and gentle, and Amy is confident and intelligent. They could exchange stories about their respective worlds and form a really nice friendship.
Definitely Naruto and Deadpool. Naruto's positive and determined nature would contrast so much with Deadpool's crazy and unpredictable personality. They would probably drive each other nuts at first, but then form an unlikely but very effective team. Naruto would be constantly trying to get Deadpool to focus and be more 'ninja - like', while Deadpool would be making Naruto loosen up and have more fun.
Naruto and Eren would definitely have an interesting interaction. Naruto, with his belief in never giving up and always finding a way forward, could inspire Eren, who has his own strong will but is also burdened by a lot of anger. Their different ways of dealing with difficult situations would make for great dialogue. Also, Levi and Sasuke could be an interesting pair. They are both highly skilled fighters with a bit of a cold exterior. They might start off as rivals, but then come to respect each other's abilities as they fight together against the Titans.
Shikamaru and Shaggy would be an odd but fun pair. Shikamaru is lazy but super smart, and Shaggy is always hungry and a bit of a scaredy - cat. They could bond over their love of food (Shikamaru likes his snacks too). And when it comes to getting out of tricky situations, Shikamaru's strategic mind could come in handy for both of them, while Shaggy's ability to run away fast might be something Shikamaru could learn from.