One consequence could be an increase in Naruto's power. Since Dark Naruto represents his repressed negative emotions and power, absorbing it might give him a boost in strength and abilities. He could gain new jutsu or have enhanced versions of his existing ones.
Well, it depends on the specific fanfiction. Sometimes, Naruto absorbing Kami could result in him having a deeper connection to the spiritual world. This might allow him to communicate with spirits more easily and gain insights into things that were previously hidden from him. He could also use this new connection to access more powerful forms of sage mode, if the fanfic writer decides to go in that direction.
Well, if Naruto absorbs the shinigami in fanfiction, it's a really wild concept. He could end up with some really strange and powerful abilities. Maybe he could use the shinigami's power to bring back the dead, or he could use it to create some kind of super - jutsu that involves the manipulation of life and death. It could also change his personality, as the power of the shinigami might be a corrupting influence.
In fanfiction, if Naruto absorbs Thanos, he might gain incredible power. Naruto already has his own set of powerful jutsus, and by absorbing Thanos, he could potentially combine Thanos' strength, durability and perhaps his control over the Infinity Stones (if they exist in that fanfic's scenario). He could use this new - found power to protect his village in a whole new way, or even expand his influence to other realms or planets.
If Naruto absorbs Madara in fanfiction, one possible outcome is that he becomes a sort of super - being. His physical abilities would likely skyrocket. He could inherit Madara's battle experience and strategic thinking. Naruto's chakra control might also improve to a new level, allowing him to perform jutsu more efficiently. However, there could be a downside. He might struggle with the darker aspects of Madara's power and memories. It could be a battle within himself to keep his own values while dealing with the influence of Madara's power. And his relationships with his friends and allies might be tested as they try to understand and deal with this new Naruto.
Yes, there are fanfictions with this plot. Some of them might be more popular than others. You could also try looking for Naruto crossovers where this absorption concept is explored in a different or expanded universe. Checking Naruto - related forums can also be a good way to find out about these specific fanfictions as fellow fans might recommend them there.
Well, it depends on the source of the Chakra he absorbs. If it's from a powerful and dark entity in the fanfiction, Naruto might struggle with the corrupting influence of that Chakra. He'd have to find a way to purify it or control it, which could be a major part of the story arc. It could also potentially change his personality a bit, making him more brooding or serious as he tries to deal with this new power.
Well, in a 'naruto absorbs hinata fanfiction', Naruto could absorb Hinata's gentle and kind-hearted nature along with her skills. This might change his personality a bit, making him more empathetic. And perhaps he could use Hinata's family techniques in a new and creative way, like combining the Gentle Fist with his Rasengan.
One common ability is the Sharingan. It's a very powerful ability from the Uchiha clan. Another could be some kind of elemental control like the ability to manipulate lightning better. Sometimes he might absorb the ability to heal quickly, which is quite useful in battles.