In some Naruto fanfictions, Naruto might absorb animals through special jutsus or abilities. For example, he could have a unique kekkei genkai that allows him to take in the essence or chakra of animals. It could also be related to some sort of pact or bond he forms with the animals, which then enables him to absorb their powers.
In some fanfictions, it could be through a special jutsu. Maybe Naruto discovers a long - forgotten jutsu that allows him to merge with his dark counterpart. This jutsu might require a great deal of chakra control and concentration.
Well, there are different ways it can happen in fanfiction. One way could be that Naruto and Mizuki are in a battle, and during the fight, Naruto accidentally activates a latent ability that allows him to absorb Mizuki. Maybe there is some sort of ancient seal on Naruto that reacts to Mizuki's presence and starts the absorption process. Another possibility is that Naruto is exposed to a strange chakra - infused object that was once connected to Mizuki, and this object triggers the absorption.
Yes, he can in some fanfiction scenarios. If the writer decides to give Naruto a special ability or a unique connection to the shinigami, then he could manage to absorb it. For instance, if Naruto has some latent spiritual power that is compatible with the shinigami's essence, he could draw it in. However, there are also fanfictions where the power of the shinigami is too much for Naruto and he fails in the attempt.
Maybe through some sort of ninja jutsu that allows Naruto to absorb the essence or power of others. It could be a new, experimental jutsu that he discovers or is taught specifically for this purpose.
In some fanfictions, Naruto might absorb Chakra through a special jutsu. For instance, he could use a self - created jutsu that allows him to draw in Chakra from his surroundings or from other characters he's in contact with.
In some fanfictions, Naruto might absorb souls through a special jutsu or power that is unique to that fictional storyline. It could be something he discovers during a dangerous mission or as a result of some strange encounter. For example, he might inherit a power from an ancient ninja clan that allows him to absorb the souls of his enemies, which he then uses to gain strength or knowledge.
One interesting Naruto absorb fanfiction could be where Naruto gains the ability to absorb chakra in unique ways, like from nature itself. This could lead to him having new and powerful jutsus.
One way Naruto might absorb chakra in fanfiction is if he has some sort of curse mark that instead of being a hindrance, it gives him the power to absorb chakra. He could touch an enemy with the curse mark and drain their chakra. Also, in some fanfictions, Naruto might be able to absorb chakra due to a new training regime. He could train with a hermit who teaches him a special meditation technique that allows him to draw in chakra from all around him.