The scales might give him new jutsu capabilities. For instance, he could learn to use the scales to create a sort of dragon - scale armor jutsu, where he can cover himself in a protective layer of scales that also has offensive capabilities, like shooting out sharp scale - like projectiles.
It might be a gift from a powerful dragon in Naruto's world. In some fanfictions, there are hidden dragons that see potential in Naruto and bestow upon him the power of dragon scales, which could be a symbol of strength and protection.
One idea could be a story where Naruto discovers his scale - like appearance after a battle in a mysterious dimension. He then has to figure out how to reverse it while also using his new form to his advantage against an emerging threat. For instance, the scales could be like a natural armor that he can enhance with his chakra.
One possibility is that it could be related to some sort of new power or transformation. Maybe it's a result of an experiment gone wrong or a connection to a long - lost bloodline. For example, it could be a remnant of an ancient clan's ability that has been dormant in Naruto all this time.
One possible plot could be that Hiccup discovers a special set of dragon scales that have unique powers. He decides to wear them for protection during his adventures. As he wears them, he starts to feel a deeper connection with the dragons, almost as if he can understand their thoughts better. This new connection helps him in battles and in finding new dragon habitats.
In some fanfictions, Naruto might obtain the dragon sword through a special quest. Maybe he stumbles upon an ancient temple during one of his missions where the sword is hidden as a powerful artifact, guarded by some kind of magic or traps. He overcomes these obstacles using his ninja skills and determination, and thus gets the dragon sword.
Well, one implication could be enhanced physical abilities. Dragons are often seen as strong and powerful creatures in many mythologies. So Naruto might have greater strength, speed, and endurance. He could also have some sort of elemental control related to dragons, like breathing fire or manipulating wind in a more dragon - like way. Maybe he could even fly in some forms, as dragons are known for their flight ability.
One common theme is power - the dragon gives Naruto an extra boost of power which he uses to face stronger enemies. For example, in many stories, the dragon's strength is combined with Naruto's own to defeat Akatsuki members.
I recommend the two novels,"The Divine Son of Destiny" and "I am a Professional Dragon Breeder", to you. Both novels involve the protagonist and the dragon-related plot. Although the plot is not exactly the same, they are both very worth reading ~ I hope you like my recommendations, muah ~😗