If Naruto was made of chakra in a fanfic, he would probably have some incredible powers. He could potentially transform into pure chakra at will, allowing him to pass through solid objects or move at extremely high speeds. Maybe he could also share his chakra with others in a more direct and powerful way, like a living chakra battery.
Well, in the realm of fanfiction, anything is possible. There could be fanfictions where Naruto is made of chakra. This could be a way for the author to explore different aspects of the Naruto universe. Maybe it's a way to show a more spiritual or elemental side of Naruto. It could also lead to new plotlines like how he copes with being such an unusual being in a world where most people have chakra but aren't made of it.
It would likely change his relationships. Other characters might view him differently. Some might be in awe of him, while others could be afraid. His friends, like Sasuke, might have a different dynamic with him. Also, his role in the village could change. He might be seen as more of a spiritual or elemental force rather than just a ninja. This could lead to new responsibilities and expectations placed on him within the village.
In a Naruto fanfic where he's made of chakra, his growth and development would be unique. He might not need to eat or sleep in the same way as normal humans in the Naruto world. This could free up a lot of time for him to train or explore. Also, his connection to nature chakra could be even stronger, as he is already a being of pure chakra. This could lead to him developing new and powerful Sage Mode variants that are exclusive to his chakra - made form.
In Naruto fanfic, chakra theory can be explored in many ways. For example, some fanfics might focus on a character developing a new type of chakra control or a unique chakra nature. It could be about a character who discovers an ancient chakra technique that was lost in the main Naruto storyline. Fanfic authors often take creative liberties with chakra theory to make their stories more interesting.
One interesting concept could be a character unlocking the hidden potential of the chakra gates in a unique way. For example, they might discover a new sequence of opening the gates that gives them powers beyond what was thought possible in the original Naruto lore.
One consequence could be that he becomes extremely powerful. His physical abilities like strength, speed, and endurance are enhanced. He can also use more powerful jutsus with the extra chakra boost from the Kyuubi.
One interesting way is when Naruto absorbs chakra through his shadow clones. In some fanfictions, the clones can be used not just to gather information or attack, but also to absorb the chakra of the opponents they interact with. Then, they transfer this absorbed chakra back to Naruto, making him more powerful.
Perhaps there is an ancient artifact or a powerful curse that causes Naruto to absorb all chakra. In the fanfiction world, it's common to introduce such unique elements. For example, he might find a magical scroll that, when opened, starts sucking in all the chakra in the vicinity and then channels it into Naruto. Or it could be a curse placed on him by an enemy, but instead of harming him, it gives him this strange power to absorb all chakra.
The consequence might also be a shift in the balance of power in the Naruto universe. With all that chakra, Naruto could potentially change the political situation. He could end wars single - handedly or force the different ninja villages to re - evaluate their strategies. Moreover, his own physical and mental state might be affected. There could be a struggle within him to keep his identity intact while dealing with such an overwhelming power source.