One idea could be Naruto getting transported to the Mario world. He might use his ninja skills to help Mario in his adventures, like using his speed to outrun the Bullet Bills. Another could be Mario somehow ending up in the Naruto universe and trying to navigate through the Hidden Villages using his jumping and power - up skills.
Well, you could create a fanfiction where Naruto and Mario team up to fight a common enemy. Maybe a new villain that combines the powers of the Akatsuki and Bowser's forces. They would have to combine their unique abilities. Naruto could use his Rasengan while Mario uses his Fireballs. And they would also learn from each other's worlds, for example, Naruto could be amazed by Mario's warp pipes and try to figure out if something similar could be made in his world.
One idea could be that Naruto somehow gets transported into the Super Mario world. He could use his ninja skills to help Mario defeat Bowser in a unique way. For example, Naruto's shadow clone jutsu could be used to create multiple distractions while Mario sneaks up on Bowser.
One idea could be that Naruto gets transported to the Mario world. He might use his ninja skills to help Mario and Luigi in their battles against Bowser. For example, Naruto could use his Shadow Clone Jutsu to confuse Bowser's minions while Mario goes for the power - up.
A great mario rabbids fanfiction could be about a Rabbid who dreams of becoming a hero like Mario. So, he follows Mario around on his adventures, getting into all sorts of comical and dangerous situations as he tries to prove himself worthy of being a true hero.
Well, a common idea is the cultural exchange between Mario's world and Peach's. Since they come from different parts of the Mushroom Kingdom, their marriage could lead to new traditions. For example, Mario's love for power - ups might influence the way the Mushroom Kingdom celebrates holidays. Also, Peach's elegance could be introduced to Mario's more down - to - earth friends like Luigi.
One idea could be a crossover with the Legend of Zelda series. Link could be a special guest in the Mario Party world, bringing his unique items like the Master Sword and Hylian Shield. He might participate in mini - games that require his combat skills or puzzle - solving abilities.
One idea could be that Bowser gets tired of always being the bad guy and tries to make amends with Mario. They could end up teaming up against a new, greater evil in the Mushroom Kingdom.
Well, in Super Mario OC fanfiction, sometimes there are really cool crossovers. Like an OC from the Super Mario world meeting characters from other Nintendo franchises. This can lead to unique adventures and interactions. Also, some fanfictions focus on the backstories of the OCs, how they came to be in the Mario universe, which can be very engaging.
One idea could be that Mario and Peach's baby has special powers inherited from both of them. For example, the baby could have Mario's jumping ability and Peach's ability to communicate with nature. This would lead to all sorts of adventures as the baby discovers its powers while growing up in the Mushroom Kingdom.
One idea could be that Mario and Link team up to save both the Mushroom Kingdom and Hyrule from a common enemy. Maybe a powerful dark wizard has found a way to merge the two worlds in a chaotic way, and they have to use their unique skills to restore order. Mario's jumping and power - ups combined with Link's swordsmanship and item - using abilities would make for an exciting adventure.
One idea could be a crossover with the Mario Kart universe. Mario and his friends from Super Paper Mario could find themselves on the race tracks, facing off against the regular Mario Kart characters. Another could be a crossover with the Legend of Zelda. Maybe Mario has to traverse Hyrule, using his paper - like abilities in a new and strange land filled with Zelda - style dungeons and puzzles.