One possible source could be some kind of ancient and forbidden jutsu. Maybe there was a long - lost scroll in the Hidden Leaf Village that when Naruto accidentally opened it, the power of the Hollows somehow transferred into him. Another source could be an encounter with a mysterious being from another dimension. This being, seeing Naruto's potential, decided to bestow him with hollow powers for some unknown reason.
Well, if Naruto had hollow powers in fanfiction, it would drastically change the Naruto universe. Firstly, his combat style would be completely different. He might be able to use Hollow - like abilities such as Cero, which is a powerful energy blast. This would give him an edge in battles against strong opponents like Pain or Madara. Also, his appearance could change, perhaps having a Hollow mask or some Hollow - related markings. His relationships with other characters might also shift. For example, Sasuke might view him as even more of an enigma or a threat, depending on how Naruto controlled these new powers.
In a fanfic about Naruto having hollow powers, the plot could revolve around the idea of Naruto accidentally awakening these powers during a particularly intense battle. These powers could initially be uncontrollable, causing chaos. Naruto would then have to train hard to master them. He might find that his hollow powers give him a new form, like a transformation similar to the Nine - Tails mode. This new form could have unique abilities that he could use to protect his village and friends, and also to explore new regions and face new threats that normal ninja techniques couldn't handle.
Well, 'naruto is a hollow fanfiction' might be a really unique take on the Naruto universe. If we consider 'hollow' in a more general sense, like an empty or void - like state, it could be a story that explores Naruto in a state of emotional or spiritual hollowness. Maybe he has lost his purpose or something has made him feel empty inside, and the fanfiction delves into that aspect of his character in a new and creative way.
One great Naruto and Hollow fanfiction is 'Naruto: Hollow Shinobi'. In this fic, Naruto discovers a strange power related to Hollows. It has an interesting plot where Naruto has to learn to control this new power while still dealing with the regular challenges in the Naruto world. The character development is quite engaging as Naruto becomes more complex, having to balance his normal ninja skills with the Hollow - like abilities.
Well, in this kind of fanfiction, it might be about Naruto taking on the role of the 'hollow king' which could mean a whole new set of powers and a different personality for Naruto. It could be a really interesting take on the Naruto universe, mixing Naruto's world with elements related to the concept of a 'hollow king'.
Well, a good Naruto and Hollow fanfiction should have great action scenes. Since Hollows are often associated with combat in the Bleach universe, when combined with Naruto's ninja skills, there can be some epic battles. Additionally, the way the two universes are merged needs to be seamless. If it feels forced, it won't be a good fanfiction. Good fanfictions also explore the cultural and power differences between the two worlds in an engaging way.
Naruto would likely become more complex. His initial naivete might be tempered by the new power. He'd have to be more cautious as the hollow powers could be dangerous. He might also develop a darker side that he has to constantly fight against. For example, the hollow powers could bring out some of his repressed anger in a more violent way.
There could also be original characters created specifically for the 'naruto hollow house fanfiction'. These characters could be the guides or the antagonists within the hollow house. They might have unique abilities that are tied to the nature of the hollow house, like being able to control the illusions or the very fabric of the house itself.
I'm not sure specifically as it could be a very unique fan - made concept. It might involve Naruto having some sort of inner 'hollow' like an inner turmoil or a hidden power within him that is represented as a 'hollow' in a non - traditional sense for the Naruto universe.