Well, the plot is crucial. A good overpowered harem Naruto fanfic should have an engaging plot that goes beyond just Naruto being powerful and having a harem. It could involve some sort of mystery or a big overarching goal that Naruto and his harem are trying to achieve. Also, the relationships in the harem should be complex and not just based on Naruto's power. For instance, there could be rivalries and friendships among the harem members themselves.
One popular overpowered harem Naruto fanfic is 'Naruto: The Harem God'. In this fanfic, Naruto has extraordinary powers and attracts a large group of female characters. Another is 'Naruto's Harem Adventure' which features Naruto in various exciting adventures with his harem. There's also 'Overpowered Naruto in the Harem World' where Naruto's abilities make him stand out in the harem - centered story.
Well, it's often due to the creative freedom in fanfic. Fanfic authors may exaggerate Naruto's power to create more exciting and dramatic storylines. They might make him overpowered to show how he could easily defeat the toughest opponents. Also, it could be a way to explore different power levels and how they would impact the Naruto universe.
One common way is by giving him new and extremely powerful jutsus. For instance, a fanfic might create a jutsu that allows Naruto to manipulate time, which is way beyond his original abilities. Another way is by making his physical strength and speed far greater than in the original series. He could be shown to move at lightning - fast speeds and lift mountains effortlessly.
Well, 'funny overpowered naruto fanfic' often features Naruto with absurdly strong abilities. For instance, there's a fanfic where Naruto can control the weather just by sneezing. He sneezes during a battle and accidentally summons a huge thunderstorm that drenches everyone. Also, in some fics, his shadow clones develop minds of their own and start doing really wacky things like having a dance - off in the middle of a mission. These fanfics add a comical twist to the Naruto universe.
One popular 'Naruto overpowered OC fanfic' is 'The Legendary Ninja's Ascent'. In this fanfic, the original character has a unique power that allows them to manipulate time, which makes them extremely overpowered compared to the regular Naruto characters. Another one could be 'OC: The Shinobi Beyond Limits' where the OC has a special kekkei genkai that combines all the existing ones in the Naruto world, giving them an edge in battles.
It could be a sword that can cut through any substance, like the Susanoo easily. Just imagine Naruto swinging it and slicing through powerful jutsu defenses as if they were paper.
One popular 'overpowered' Naruto fanfic is 'Naruto: The Gamer'. In this fanfic, Naruto has a gamer - like ability which makes him extremely powerful in a unique way compared to the original series. It adds an interesting twist to the Naruto universe.
In a 'naruto is in a au harem fanfic', aside from the obvious choices like Sakura and Hinata, characters like Temari could be in Naruto's harem. She's from another village and has a strong personality. Her presence would bring in an element of cross - village relations. Karui is also a possibility. She's feisty and has her own set of skills. And then there's Kurenai, the jonin. She could be an interesting addition to the harem, with her experience and calm demeanor.