A common theme is self - improvement. Naruto's change to a slender body often represents a growth in his physical capabilities, which ties into his journey of becoming a stronger ninja. For example, he might be more focused on his diet and exercise as part of his ninja training in these fanfictions.
Sure. One popular 'Naruto slender body fanfiction' might be those that focus on Naruto's physical transformation and how it affects his ninja abilities. For example, some stories could depict him using his new slender physique to be more agile during combat, like being able to dodge attacks more swiftly and perform acrobatic maneuvers with greater ease.
A lesser - known but really good one is 'Naruto's Slender Companion'. It delves deep into the backstory of the uke character with a slender body. It shows how their physical appearance affects their relationships and their journey in the ninja world. The story is filled with heartwarming moments as well as some intense battles.
You can try Archive of Our Own (AO3). It has a large collection of fanfictions, including those related to Naruto with the slender body uke trope. The search function on AO3 is quite good, allowing you to filter by tags to find exactly what you're looking for.
I'm not sure about its popularity. Fanfictions can vary greatly in how well - known they are. It depends on how many people are interested in the crossover concept of Naruto and Slender Man. There are so many fanfictions out there that it's hard to say if this one has a large following.
In this fanfiction, it might start with a strange backstory of how Naruto came to be the son of Slender Man. Maybe there was some sort of otherworldly interference. His relationships with his friends like Sasuke and Sakura would be very different. They might be scared or intrigued by his new heritage. And Naruto himself would have to deal with the fact that he's not what he thought he was, all while facing the usual challenges in the Naruto universe, like fighting enemies and protecting his village.
Maybe in the fanfiction, Slender Man has an alliance with Orochimaru. Orochimaru is always interested in strange and powerful beings. Together, they plan to take over the ninja world. Naruto and his friends then have to not only face Orochimaru's usual schemes but also deal with the terrifying abilities of Slender Man.
Sasuke would likely be on high alert. He'd immediately analyze Slender Man's movements and try to find a weakness. He might start by using his Sharingan to see if he can detect any patterns in Slender Man's attacks.
No, it doesn't seem like a common type. Most Naruto fanfictions focus on things like new adventures, relationships, or exploring different powers. Crushing Naruto's body is a rather extreme and not - so - common concept.
Fanfiction often plays with the concept of Naruto and Madara's bodies in different ways. For example, there could be a story where Madara's body is resurrected but with Naruto's spirit or chakra influencing it. This would create a unique blend of their personalities and abilities, and it might change the entire Naruto universe as we know it. It could also be a way to explore redemption arcs or new alliances in the fan - created storylines.