Another theme is power - up. By absorbing knowledge, he gains new abilities or enhances existing ones. This often leads to epic battles where he can show off his new skills against powerful foes. For example, he might absorb knowledge about sealing techniques and use it to defeat an enemy who was previously too strong for him.
One interesting story could be where Naruto absorbs the knowledge of ancient ninja techniques from a long - forgotten scroll. He then uses this new - found knowledge to develop his own unique jutsu that combines old and new elements.
One great fanfiction could be 'The Knowledge Seeker'. In this story, Harry discovers a hidden library in Hogwarts that contains ancient spells and forgotten knowledge. He spends his free time there, absorbing all kinds of magical lore. It's really interesting to see how he uses this new - found knowledge to solve various problems in the wizarding world.
One consequence could be that he becomes overly powerful. His new - found ability to absorb chakra might make him a force to be reckoned with, changing the power dynamics in the fanfiction world. Enemies may fear him more, and allies might start to rely on him even more heavily.
One consequence could be new powers. If he absorbs the DNA of a powerful ninja, he might gain their unique abilities. For example, if it's from a ninja with ice - based powers, Naruto could potentially start to use ice - based jutsu. Another consequence could be changes in his appearance. The absorbed DNA might have physical traits that start to show up on Naruto, like different eye color or hair texture.
There could be physical changes too. Naruto might have a new form that combines his own features with Momoshiki's. His body could become more resilient, like Momoshiki's, and he might have a different chakra signature. This new form could attract the attention of other villains in the Naruto universe, either out of fear or the desire to steal his power. Moreover, his relationships with other characters like Sasuke could be affected, as they have to adapt to this new Naruto who has absorbed Momoshiki.
He could gain new and powerful abilities. For instance, if he absorbs a Sharingan - like bloodline, he might gain enhanced vision and the ability to copy jutsus more effectively. But there could also be negative consequences. His body might reject the new bloodline at first, causing him pain and internal conflict.
In fanfiction, when Naruto absorbs animals, it might lead to a change in his personality. If he absorbs a predator like a wolf, he could become more aggressive or assertive. On the physical side, his body might adapt to the absorbed animals' traits, which could cause some difficulties in his normal ninja activities at first. Socially, some people in the Naruto world might see him as a freak or a powerful new threat, depending on their views.
One consequence could be a change in his personality. If he absorbs the souls of evil - natured people, there might be a dark influence on him. For example, he could become more aggressive or cynical.
Well, it really depends on how the author of the fanfiction writes it. One possibility is that Naruto's personality could be affected. Since the Gedo Mazo is associated with negative and powerful forces, Naruto might struggle with darker impulses. However, he could also use this new power to protect his friends and the village in ways he couldn't before. Maybe he could even find a way to purify the dark chakra he absorbed from the Gedo Mazo and turn it into a positive force for good in the fanfiction world.
One consequence could be a change in his fighting style. With Samehada's absorption ability, Naruto could start using more defensive and counter - attacking strategies. He might be able to absorb an opponent's chakra - based attacks and then use that energy against them. Also, his relationship with his friends and allies could be affected. They might be a bit wary of his new power at first, but as they see Naruto using it for good, they would come to accept it.