Naruto's power skyrockets. Firstly, his healing factor would be enhanced, as some bijuu have shown great regenerative abilities. His sensory skills would also improve as he can tap into the bijuu's awareness. He could summon the bijuu at will and use them in various combat strategies. For instance, he could use the power of the Eight - Tails for its tentacle - like attacks and the Nine - Tails for its raw power. All in all, he becomes a force to be reckoned with in the Naruto universe.
His power becomes extremely overwhelming. With all nine bijuu, Naruto gains access to an insane amount of chakra. He can perform massive jutsu without much strain. For example, his Rasengan could potentially be magnified to a scale that could destroy large areas with ease. Also, his physical abilities like strength and speed would be enhanced to superhuman levels due to the boost from the bijuu's power.
Well, it makes Naruto extremely powerful. He becomes like a force that no one can easily oppose. His chakra level skyrockets, and he can use the unique abilities of each bijuu. This changes the power balance as he can now handle threats that were previously too difficult, like taking on powerful villains single - handedly.
It would completely transform his power level. Consider that each bijuu has its own distinct set of skills and chakra reserves. Naruto would be like a living, breathing nuclear reactor of chakra. His ability to heal himself might be enhanced, as some bijuu are associated with life - force. He could also potentially communicate with all the bijuu spirits, getting their insights and battle strategies. This new - found power would not only make him stronger in direct combat but also give him an edge in terms of strategy and knowledge. He could become a sort of protector of the entire ninja world, with the combined might of all the bijuu at his disposal.
After absorbing all the bijuu in fanfiction, Naruto's character undergoes a significant transformation. He becomes more solemn as he realizes the great responsibility that comes with such power. His once - exuberant and sometimes reckless nature might be tempered as he has to be more careful with his actions. He might also feel a sense of loneliness as few can truly understand what he is going through. His relationships with friends like Sasuke might become more complex as Sasuke may see Naruto as a different person now, and Naruto might have to work hard to maintain their bond while also dealing with his new - found power.
If Naruto has all bijuu in fanfiction, it's a huge game - changer. Firstly, his training and growth would be on a whole new level. He'd have to learn to balance the different natures and personalities of each bijuu. His opponents would have to come up with new strategies to face him. Moreover, it could open up stories about how he uses the bijuu to bring peace to the ninja world. Maybe he could use their power to stop wars and conflicts, or to protect the weak. It could also lead to interesting interactions with characters like Sasuke, as they might have different views on how to use such great power.
In many Naruto fanfictions, if Naruto has three bijuu, they could be the Nine - Tails (Kurama) which he already has in the original series, perhaps the Eight - Tails (Gyuki) as it has a connection with Naruto's world and Akatsuki's hunt for the bijuu. And another could be the Three - Tails (Isobu). However, it really depends on the specific plot and creative direction of the fanfiction.
His character would likely develop a sense of greater responsibility. With all that power from the bijuu, he knows he has to use it for good. He might become more serious and less of the carefree Naruto we know at first. He'd also grow in terms of his self - confidence, knowing he has such incredible strength.
The story might progress with Naruto becoming a sort of super - protector. He could use the power of all bijuu to defend the Hidden Leaf Village from any threat.
His status as the jinchuuriki of all bijuu would change the political landscape of the Naruto universe. Konoha would become the most dominant village. Other villages might seek to either ally with Konoha or try to find ways to counter Naruto's power. It could also lead to a new era of peace as no one would dare to start a war against a being with such overwhelming power. However, there could also be those who would try to take advantage of Naruto's power for their own evil purposes.
In fanfiction, if Naruto is half - bijuu, his appearance could change in several ways. His ears might be a bit pointed, like those of a fox if it was related to the Nine - Tails. There could be a faint glow around him, especially when he gets angry or uses his bijuu - related powers. His nails could be longer and stronger, like claws. And his gait or the way he moves might change, becoming more like the way the bijuu moves. He might even have a faint, beast - like growl in his voice at times, which would be a very distinct change in his appearance and the way he presents himself.
Naruto might be initially shocked. He has always seen the bijuu as powerful entities, not as potential mates. But being Naruto, he would likely approach the situation with his usual kindness and try to understand their feelings.