If Naruto invented the 'Energy Absorption Jutsu', it could change the plot significantly. He could absorb the chakra or energy of his enemies, weakening them while strengthening himself. This would make him an even more formidable opponent and could potentially shorten battles, as he could quickly disable foes.
The 'Teleportation Network Jutsu' could also have a huge impact. Naruto could create a network of teleportation points across the ninja world. This would allow for faster travel and communication between allies. It would also change the way battles are fought, as he could quickly bring reinforcements or escape from dangerous situations.
One jutsu he could invent is the 'Elemental Mimicry Jutsu'. With this, Naruto could temporarily take on the properties of any element he has encountered. For example, he could become as fluid as water to slip through attacks or as solid as earth to withstand powerful blows.
Sasuke could be one of the people to teach Naruto new jutsus. They have a friendly rivalry and Sasuke has some unique jutsus like his Rinnegan - related abilities. He could teach Naruto some aspects of the Rinnegan's power, or at least how to counter it more effectively which could be considered a new 'jutsu' in a sense.
It changes the original story a great deal. In the original, Naruto has to strive to learn new jutsu. But in this fanfiction concept, he already has them all. This means he can handle threats much more quickly and efficiently. For instance, in battles that were difficult in the original, like against Pain, he could have ended it more swiftly.
If Naruto invents a gun in the fanfiction, it would bring a whole new level of chaos to the ninja world. Imagine the shock on the faces of the other ninjas when they first see this strange device that can shoot projectiles at high speed. The traditional values of honor and skill in combat might be challenged. Some ninjas might see it as an unfair advantage, while others might try to quickly learn how to use it. It could also change the way ninja missions are carried out. Instead of relying solely on stealth and ninjutsu, they might start using guns for more direct and forceful approaches. This would require a re - evaluation of the training and skills that ninjas need to possess.
If Naruto has a new secret jutsu in fanfic, like a super - powerful healing jutsu, it could change the story by allowing him to save more lives during battles. For example, he could heal injured comrades immediately and keep them in the fight. This would boost the morale of his side and potentially change the outcome of many battles.
He could create a jutsu that allows him to teleport short distances. Given his quick thinking and need for mobility in battles, a short - range teleportation jutsu would be very useful. It could be like a mini - version of Kamui but powered by his own chakra.
If Choji has a better jutsu for his size - increase, it could make him a more integral part of the team. His friends would see him in a new light and they might have more group strategies that revolve around his new power. Kiba and Akamaru's new transformation jutsu would make them a more formidable duo, and the others would respect their fighting ability more. This would enhance the overall camaraderie among the rookie nine.
He could become more cautious at first. Since it's a new world, he doesn't know what to expect, so he might hold back his usual boldness.
The plot could become more straightforward. Without Naruto's acting, there would be less deception and more direct confrontation. For example, if Naruto was previously acting as a double agent, his true identity being revealed earlier would lead to immediate battles or negotiations.
Well, in Naruto fanfiction, creating new jutsus is a creative process. Some ninjas could create jutsus based on their emotions. For instance, a ninja who has experienced great loss might create a jutsu that is related to grief, like a jutsu that summons dark energy. Additionally, ninjas can also create jutsus by collaborating with others. Two ninjas with different elemental affinities could work together to create a combined - element jutsu. And sometimes, it's just pure inspiration from a dream or a vision that a ninja has, which then leads to the development of a new and unique jutsu.