Sure. You can find some on popular fanfiction websites. They range from short, fun reads to long, in - depth stories. A lot of them play with the idea of Naruto characters being introduced to the Sailor Moon world and vice versa. It's really interesting to see how the different character dynamics change in these crossovers. Some might be more action - oriented, while others could be more about the characters getting to know each other's cultures.
Plotting can also be a pain. You need to figure out a reason for these two groups of characters from different universes to meet. It could be some sort of magical portal or a powerful enemy that affects both worlds. Then, you have to decide how they will react to each other, how they will work together (if they do), and what the overall goal of the story will be. There are so many elements from both series to consider that it can be overwhelming when trying to write a good crossover fanfiction.
One idea could be that Ranma accidentally stumbles into the world of Sailor Moon. Maybe he gets caught up in a fight against a youma and the Sailor Scouts mistake him for an enemy at first. But then they realize he has his own unique fighting skills and they team up to defeat the common foe.
One interesting plot could be that the Sailor Guardians are on a mission to a world similar to Naruto's. There, they meet Naruto and his friends. Naruto is initially confused by their strange powers but quickly realizes they can help fight a common enemy. Maybe an evil force from the Sailor Moon universe has teamed up with Orochimaru. The Sailor Guardians' magic combined with Naruto's ninja skills could make for some epic battle scenes.
One interesting plot could be that the villains from both universes team up. The Akatsuki from Naruto and the Dark Kingdom from Sailor Moon might join forces to collect powerful artifacts. Naruto and the Sailor Scouts would then have to put aside their differences in fighting styles and powers to defeat this new, combined threat. They could learn from each other's combat techniques. For example, Naruto might teach the Scouts about his shadow clone jutsu, while Sailor Moon could show Naruto how to use the power of love and friendship in a more direct way to boost his power in battles.
One possible plot could be that Naruto and his friends are transported to the Sailor Moon universe. Naruto's chakra could be seen as a similar power to the Sailor Scouts' magic. They could team up to fight a common enemy, like an evil force that is draining both the chakra and the magic energy in both universes. Naruto's determination and the Sailor Scouts' love and justice - driven powers could combine in unique ways to defeat the foe.
I think it could be Naruto in his most powerful form, like when he has all the tailed beasts' chakra and is in his ultimate Sage Mode. His attacks are extremely destructive and he has a lot of combat experience. However, Sailor Saturn is also a very powerful character in the Sailor Moon universe. She has the power of destruction which is on a large scale. If they were to fight, it would be interesting to see how Naruto's positive energy and fighting skills would fare against Sailor Saturn's more passive yet extremely powerful destruction abilities. But overall, Naruto's versatility and his growth potential might make him the most powerful in a crossover scenario.
One common theme is power combination. Writers often explore how the powers of Sailor Moon characters combine with those from the other crossover universe. For example, in a Sailor Moon and Dragon Ball Z crossover, they might look at how Sailor Moon's magic could work with the energy - based attacks in Dragon Ball Z.
Yes, there might be such fanfictions out there. Fanfiction is a vast world where all kinds of crossovers and unique concepts are explored. However, finding a specific 'Naruto father of Sailor Moon' one could be a bit of a challenge. You'd probably have to search on major fanfiction platforms like FanFiction.net or Archive of Our Own and use relevant keywords to narrow down the search.
Sailor Moon and Naruto would be a really interesting pairing. Sailor Moon is all about love and hope, while Naruto is full of determination and grit. They could learn a lot from each other. Another interesting pairing could be Sailor Mars and Sasuke. Sailor Mars has her fire - based powers and a strong will, and Sasuke has his Sharingan and his own complex personality. Their interactions could be full of tension and growth.