One funny fanfiction could be where Naruto and Sasuke are forced to participate in a cooking competition. Naruto tries to make ramen in the most chaotic way possible, while Sasuke is desperately trying to follow a proper recipe but keeps getting distracted by Naruto's antics. In the end, they create a dish that is a strange but hilarious combination of their efforts.
One thing that makes a Sasuke Naruto fanfiction funny is when the author plays with their personalities in unexpected ways. For example, if Sasuke, who is usually stoic and serious, is put into a silly situation like having to participate in a village - wide talent show. Or when Naruto's never - ending enthusiasm and clumsiness are exaggerated in a humorous way around Sasuke.
A funny situation could be when they have to dress up as each other for a undercover mission. Naruto can't stop giggling while trying to模仿 Sasuke's serious face, and Sasuke is constantly irritated by Naruto's lack of composure. They end up getting into all kinds of comical mishaps during the mission.
One popular type of fanfiction could be about their friendship. For example, a story might focus on a mission where Sasuke, Sakura and Naruto have to work together in a really difficult situation. They could use their individual skills, Naruto's brute strength and positive attitude, Sasuke's cool-headedness and powerful jutsu, and Sakura's medical knowledge and combat skills to overcome the odds.
There's also 'Sasuke's Unusual Day Out'. Here, Sasuke, who is usually so serious, gets caught up in a series of comical misunderstandings. He follows Naruto into a civilian market where Naruto is trying to find a special gift for Sakura. Along the way, Sasuke accidentally gets involved in a street performer's act and ends up wearing a ridiculous costume, much to Naruto's amusement.
In this fanfiction scenario, the baby of Naruto and female Sasuke would be quite special. Naruto's positive attitude and Sasuke's strong will would be passed on. Their baby might have blonde hair like Naruto and the Sharingan eyes of Sasuke. The story could explore how they protect their child from the threats that still lurk in the ninja world. It could also show how their baby's birth changes the dynamics between the different ninja clans and villages.
A fanfiction could also be set in a scenario where older Sasuke and young Naruto are accidentally sent to a different dimension. In this strange new world, they have to rely on each other to survive. Sasuke's calm and calculated nature combined with Naruto's boundless energy and optimism would make for an interesting dynamic. They'd have to find a way to get back home while also dealing with the unique challenges of this new dimension.
One possible scenario in such a fanfiction could be Naruto as Hokage having to deal with political situations in the village while Sasuke, as an Anbu, is sent on dangerous covert missions. Naruto might rely on Sasuke's intelligence and combat skills from his Anbu work to protect the village from external threats. They could also have some internal conflicts due to their different roles and the secrecy associated with Sasuke's Anbu work.
In a fanfiction set in an inn, Itachi might be there to pass on some crucial information to Sasuke and Naruto. He could choose the inn as a neutral and unexpected place. Sasuke would be hesitant to trust Itachi, but Naruto's presence might make him more receptive. They could engage in a battle of ideologies, with Naruto representing hope and friendship, Sasuke representing vengeance and Itachi representing sacrifice. The inn becomes the backdrop for this intense encounter.
A really interesting fanfiction could be set in an alternate universe where Sasuke never left the village in Naruto Shippuden. He and Sakura start to develop feelings for each other much earlier. They go through all the challenges of being young ninjas together, and their relationship blossoms as they face various threats to the village side by side, and they eventually get married and have a family.
Another aspect in fanfiction could be their rivalry. They are both very competitive and in some fanfics, this rivalry is explored in more detail. For example, they might have friendly competitions to see who can master a new jutsu faster. This not only shows their determination but also how they push each other to become better ninjas.