In the fanfiction, if Naruto finds a devil fruit, it could lead to some interesting alliances. Maybe he would team up with some characters who are interested in this new and strange power source. For example, Sasuke might be both intrigued and a bit jealous, which could create a whole new dynamic between them. Also, the Akatsuki might try to steal the power from Naruto, leading to a series of intense battles.
One possibility is that Naruto, after finding the devil fruit, would have to learn how to control its powers. This would be a huge challenge for him as it's completely different from chakra control. He might go on a journey to find someone who can teach him about the devil fruit, like an old pirate who somehow ended up in the Naruto world. And his friends, like Sakura and Kakashi, would have mixed reactions. Sakura might be worried about the potential dangers, while Kakashi would be more curious and try to analyze the situation.
He could end up selling the devil fruit. In some fanfictions, devil fruits are extremely valuable and sought - after items. Harry might not want the power or the responsibility that comes with it, so he decides to cash in on it. But this could also attract all kinds of unwanted attention from powerful and dangerous characters who want the fruit for themselves.
If Naruto had the Fire Devil Fruit, his combat style would change drastically. He could combine his existing ninja skills with the power of the fruit. For example, he might be able to infuse his Rasengan with fire, making it even more powerful. Also, his mobility could be enhanced as he could use fire to propel himself in new ways. This would make him a more formidable opponent in battles against strong foes like Sasuke or Pain.
If Naruto ate a Paramecia Devil Fruit, his physical abilities might change drastically. For example, if it was a rubber - like Paramecia fruit, his already acrobatic fighting style could become even more so. He could stretch his limbs to attack from unexpected angles, much like Luffy in One Piece. This would give him an edge in close - combat situations, and his opponents would have a hard time predicting his moves.
He might start training with it. Naruto is always eager to improve his skills, and a new sword could be a great addition to his combat abilities.
Naruto could find a book that tells the story of a great hero who was just like him, full of energy and a desire to protect. This could inspire him to new heights. He might also accidentally trigger a trap or a hidden mechanism in the library while exploring, leading to an adventure filled with challenges and puzzles to solve.
Well, he might put on the suit and suddenly feel a new sense of confidence. Maybe he uses it to infiltrate an enemy hideout. He could pretend to be a rich merchant or something, and use his ninja skills along with this new disguise to gather intel.
It's possible that the tomb contains the remains of a powerful shinobi from the past. Naruto could learn about their history and the secrets of their power. For example, if it was an Uzumaki ancestor, he might find out more about his own clan's abilities. This could lead to him unlocking new forms of his chakra or even new ways to use the Nine - Tails' power.
Well, he could use the armor to enhance his combat abilities. Maybe it has some special powers like increased speed or strength. He might also discover a connection between the armor and an ancient ninja clan, which could lead to new adventures and unlocking more of his potential.
He could start training with it immediately. Naruto is known for his eagerness to learn new techniques. With the zanbato, he might develop a new fighting style that combines his existing ninjutsu with the power of the large sword.
The baby could turn out to have some sort of special chakra. Naruto, being curious and always wanting to help, tries to find out more about it. He might seek help from Kakashi or other experienced ninjas.