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'.
Well, it could be a plot where the Venture Bros' world of super - science and espionage mixes with Rick and Morty's dimension - hopping chaos. The boys from both shows, Morty and the Venture boys, might be dragged into one of Rick's hare - brained schemes. For example, they could be on a quest to find a rare element that exists only in the Venture Bros' universe, and along the way, they encounter all sorts of wacky characters from both shows.
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.
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.
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 the Warden would be really interesting. Rick is so used to being in control and having his own set of rules in his own dimension. The Warden, on the other hand, is in charge of the chaotic Superjail. Their clash of egos and different ways of handling things would make for great drama. Rick would probably try to outwit the Warden, and the Warden would try to assert his authority over Rick.
Rick and the Warden. Rick is this super - intelligent, amoral scientist, and the Warden is this insane, power - hungry figure in Superjail. Their interactions would be wild. Rick would probably try to outwit the Warden at every turn, while the Warden would be fascinated and also threatened by Rick's intelligence and gadgets.
Rick and Tony Stark would be a really interesting pairing. They are both super - intelligent inventors. Rick's off - the - wall and often unethical scientific methods would clash with Stark's more morally - guided approach. It would be fascinating to see them argue over the best way to build a device or solve a problem.
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.
Definitely Rick and Dipper. Rick is this super intelligent, jaded scientist who has seen so much of the multiverse, and Dipper is this young, eager mystery - solver. Their interactions would be really interesting as Dipper would be constantly asking Rick questions and Rick would be either annoyed or reluctantly impressed by Dipper's inquisitiveness.
Morty and Brian could be a great pairing. Morty is often the more moral and naïve character in Rick and Morty, while Brian is the somewhat jaded family dog in Family Guy. They could have conversations about life, mortality, and the meaning of existence. Morty might be intrigued by Brian's writing and Brian could be both amused and concerned by Morty's adventures with Rick.