One idea could be creating an OC who is a super - intelligent alien from a dimension where time moves backwards. This OC could interact with Rick and Morty in a way that challenges their understanding of the multiverse. Another idea is an OC that is a half - human, half - robot created by Rick's nemesis. The OC could be on a mission to destroy Rick but ends up befriending Morty instead. A third idea is an OC that is a magical being from a dimension full of fantasy creatures and they bring a new kind of chaos to Rick and Morty's adventures.
Well, you could have an OC that is a shape - shifting bounty hunter. They're after Rick for some past crime he committed in a far - flung dimension. The OC can change into any form, which makes it really hard for Rick and Morty to figure out who they are. Another idea is an OC who is a talking plant from a planet where plants are the dominant species. This plant - OC has a special power that can neutralize Rick's high - tech weapons. And then there's the idea of an OC who is a ghost from a dimension where the dead can still interact with the living. They follow Rick and Morty around, trying to get them to solve their own murder mystery.
One idea could be an OC who is a brilliant scientist from another dimension, but with a very different moral code than Rick. They could start as an adversary but then form an unlikely alliance. For example, this OC might believe in using science for the greater good of their own dimension in a way that Rick would find naive.
One idea could be Summer going on an adventure with Rick to a parallel dimension where all the rules of time are reversed. She could struggle to adapt at first but then use her wits to survive. Another could be Summer getting involved in one of Rick's crazy experiments that accidentally gives her a unique superpower. She then has to figure out how to control it while dealing with the chaos it causes in the family.
A cool Rick and Morty crossover fanfiction idea is with 'Back to the Future'. Marty McFly could end up in Rick's dimension and they could team up to fix some time - space continuum issues that Rick's inventions caused. Or a crossover with 'The Simpsons'. Homer could be awed by Rick's intelligence and Morty could make friends with Bart. Also, a crossover with 'Star Trek' would be amazing. The crew of the Enterprise might be both intrigued and horrified by Rick's unethical scientific experiments.
One idea could be Naruto characters getting access to Rick's portal gun and exploring different dimensions in the Rick and Morty universe. They might encounter strange creatures and have to use their ninja skills to survive.
One idea could be a fanfic where Rick and Morty get stuck in a dimension where time runs backwards. Another could be about Morty becoming a super - intelligent scientist like Rick for a day. Maybe a fanfic where they meet alternate versions of themselves who are complete opposites in terms of personality.
In a genderbend fanfiction, perhaps female Rick and female Morty stumble upon a planet where gender roles are completely reversed from what they're used to. This leads to a series of comical and thought - provoking situations. For example, they might find that on this planet, women are the ones who are always on adventures and men stay at home. This could make them reevaluate their own relationship and the roles they play in their adventures.
One idea could be that Fem Morty discovers a new dimension with Grandpa Rick that has a society ruled by female scientists. They have to navigate the strange social norms and power dynamics there.
One idea could be exploring an alternate universe where Rick is a good guy and helps different planets instead of causing chaos. Another could be a story where Morty discovers he has a hidden power that even Rick doesn't know about. Maybe a fan fiction about Rick and Morty getting stuck in a time loop and how they try to break out of it.
In a crossover fanfiction, Rick could be intrigued by the strange anomalies in Gravity Falls. He decides to study them, dragging Morty along. They run into the Pines family, and Rick starts making deals with Grunkle Stan to get access to some of the more mysterious areas of the town. However, his actions start to awaken some long - dormant and dangerous entities in Gravity Falls that both sets of characters have to deal with.
One interesting 'Rick and Morty fanfiction' story could be about Morty becoming a more confident adventurer on his own. He might go on a solo mission to a dimension where time moves backwards. Another could be a story where Rick has to deal with an alternate version of himself that is actually kind and helpful, which would be a huge change from the regular Rick. There are also fanfictions that explore what would happen if Summer got Rick's portal gun and started her own crazy adventures across the multiverse.