Naruto might be able to break free if he taps into his inner strength, like the power of the Nine - Tails. The Nine - Tails has always been a part of him and could provide the mental resistance needed to overcome the brainwashing.
Perhaps with the help of his strong bonds with his friends. Their love and trust could be the key to snapping him out of it.
One way could be through the power of his friends. Their memories and the bonds he has with them might be strong enough to break through. For example, Sasuke's presence could stir something in Naruto, making him question the false beliefs Danzo has implanted in his mind.
Well, he could be made to do all sorts of things against his will. Maybe he'd be forced to fight his friends. It would be a really dark turn for his character, as Naruto is known for his strong will and loyalty.
In some fanfictions, the brainwashing jutsu on Naruto could be part of a bigger scheme. For example, a new villainous organization wants to use Naruto as a weapon. They brainwash him and try to control his immense power. But Naruto's willpower, even under the jutsu, might start to show through in small ways, and his friends use these glimmers to figure out how to save him.
Another possibility is a new, unknown enemy. This could be someone from a far - off land who has heard of Naruto's power and developed a special brainwashing jutsu just to take over Naruto and use him to conquer other villages.
In fanfiction, the reanimation jutsu might have extended or modified limitations. For instance, in the original, there were clear rules about the caster's control over the reanimated. But in fanfiction, a writer could create a scenario where the reanimated can break free of that control more easily. Also, the source of the sacrifice for the jutsu could be different. In the series, it was usually human sacrifices, but fanfiction might explore using other forms of energy or substances.
Well, in certain fanfic scenarios, Naruto could learn paper jutsu as a result of some experimental training. For example, he might be trying to combine different elements of his existing jutsu and accidentally discovers a way to manipulate paper. It could be that his chakra takes on a new form during a particularly intense training session and he realizes he can control paper with it.
He might improve it by making the transformation more dynamic. Instead of just a static form, it could have special effects like a glittery aura or flowing hair that seems to move on its own. Also, Naruto could experiment with different voices during the jutsu to make it more seductive.
To write a Naruto creates jutsu fanfiction, consider his growth as a ninja. He has learned from many mentors. In this fanfiction, he could combine the teachings of Jiraiya, Kakashi, and even the Sage of Six Paths to create a unique jutsu. For instance, he might create a jutsu that uses the Rasengan's shape - manipulation along with some of the Sage Mode's power - up. Also, don't forget the emotional aspect. Maybe he creates the jutsu in memory of a fallen comrade, giving it more significance and power.
In Naruto fanfiction, cheat codes can drastically change the use of jutsu. They might allow a character to instantly master a jutsu that usually takes years of training. For example, a cheat code could give Naruto the ability to use the Rasengan without any training from Jiraiya. It's a fun concept that adds an interesting twist to the Naruto universe.
In fanfiction, the world of Naruto is often expanded upon. Regarding Naruto's ability to copy jutsu, it can be a central plot point in some stories. For example, a fanfiction might have Naruto encounter a powerful enemy with a jutsu he's never seen before. His ability to copy it could be the key to his victory. Or perhaps the fanfiction explores the consequences of Naruto copying too many jutsu, such as losing control of his chakra or having his own identity as a ninja become muddled because he's using so many different copied techniques. There are countless possibilities when it comes to Naruto's jutsu - copying ability in fanfiction.