Naruto may gain full control of the Kyuubi in the fanfiction by first strengthening his own chakra. As he becomes more powerful in his own right, he is better able to handle the Kyuubi's chakra. Then, through meditation and self - reflection, he learns to coexist with the Kyuubi. He might also receive some kind of guidance from an unexpected source, like an ancient ninja spirit, that shows him the way to fully master the Kyuubi's power without suppressing it but rather working in harmony with it.
He might gain it through a series of trials. Maybe he has to face his deepest fears in some kind of mental realm where the Kyuubi resides.
In the fanfiction, Naruto could gain full control of Kyuubi by building a stronger bond with it. He might communicate with the Kyuubi on a deeper level, understanding its past and its own desires, which in turn allows him to have complete control over its power.
In the 'fem kyuubi wants control of naruto fanfiction', the fem Kyuubi may try to gain control through mind games. She could manipulate Naruto's memories or create illusions to make him more pliable. By messing with his perception of reality, she hopes to make him more reliant on her and thus gain control. Also, she might use her unique connection with Naruto, as the Kyuubi, to plant suggestions in his mind when he's vulnerable.
His combat abilities are enhanced greatly. With full control of the Kyuubi, Naruto can access its chakra more freely. This means he can enter the Nine - Tails Chakra Mode without the risk of losing control. His physical strength, speed, and endurance are boosted to superhuman levels. For example, he can move at incredible speeds, dodge attacks more easily, and deliver more powerful punches and kicks.
Well, in certain fanfic concepts, Naruto could control Kyuubi chakra with the help of unique jutsu or seals. For example, he might discover a new sealing technique that allows him to better manage the flow of the Kyuubi's power. This new seal could work in harmony with his own chakra system, enabling him to draw on the Kyuubi's strength without being overwhelmed. Also, some fanfictions might suggest that his strong emotional bonds, like his friendship with his comrades, give him the extra mental fortitude to control such a powerful chakra source.
It could be through some kind of ancient training method. Maybe he discovers a hidden scroll that details the art of blood control and spends months or even years mastering it.
Maybe through some kind of special training or a unique ritual. It could be that he discovers a hidden method within the ancient scrolls of his village.
In some fanfictions, it could be due to a new jutsu he discovers. Maybe during a secret training session in an ancient scroll, he finds a forbidden technique that allows him to control people.
Well, in some fanfictions, Naruto might gain the ability to control nature through intense training with a hermit or some ancient spirit. For example, he could be led to a hidden grove where the essence of nature is concentrated, and by communing with it over time, he gradually unlocks the power to control nature.
Maybe it could be through some sort of magical jutsu. Naruto is known for his unique ninjutsu skills in his own universe. He might have developed a new jutsu that allows him to connect with and control the Hulk's mind. For example, it could be a jutsu that detects and manipulates gamma radiation, which is what created the Hulk. Or perhaps he found a way to use his chakra in a new way to interface with the Hulk's rage - powered form.
Another possibility is that Naruto acquires the ability to control the weather from a powerful artifact. He might stumble upon an ancient relic during one of his adventures. This artifact has the power to control the weather, and once Naruto touches it or figures out how to use it, he gains this extraordinary ability. It could be that the artifact was created by a long - forgotten civilization that had mastered the art of weather manipulation.
When Naruto has full control of the Kyuubi in the fanfiction, it changes his relationships in multiple ways. His relationship with Kakashi becomes more of an equal partnership. Kakashi no longer has to worry about Naruto losing control. With Hinata, she may feel even more admiration for him as he has tamed such a powerful force. For the other ninja clans in the village, they may start to approach Naruto to learn from his control over the Kyuubi. This new - found status also gives Naruto more influence in the village's politics and decision - making, as his power is now seen as an asset rather than a liability.