In Naruto fanfiction, one common power - up is related to new jutsu creation. For example, some fanfictions might have Naruto develop a jutsu that combines the power of all five chakra natures in a completely unique way. This could give him an edge over his enemies like never before. Another aspect could be the enhancement of his Sage Mode. Maybe he finds a way to make it more stable and powerful, allowing him to stay in the mode for a much longer time without any negative side effects. There are also fanfictions where Naruto gains the ability to control time, which is a completely new and overpowered concept that makes for really interesting stories.
In Naruto fanfiction, power levels can vary greatly. Some fanfictions might boost the power of a character like Naruto himself, making his already strong Rasengan even more powerful, perhaps with new elements added. Others might focus on secondary characters and give them powers on par with the main characters. For example, a fanfiction could make Rock Lee able to use some form of ninjutsu on top of his taijutsu skills, which would significantly increase his power level in that fictional story.
One way is through enhanced emotional bonds. If Naruto experiences a very strong emotion like extreme love or a sense of justice, it might trigger a stronger connection to the Kyuubi and thus more power. Another way could be through new types of seals. Maybe a fanfic writer creates a seal that not only contains the Kyuubi but also channels its power more effectively to Naruto.
In a Naruto Kaido fanfiction, to incorporate their different power systems, you could have Naruto's chakra - based jutsu interact with Kaido's Devil Fruit powers. For example, Naruto's Fire Style: Great Fireball Technique could be used against Kaido's ability to transform into a dragon. The heat from the fireball might have different effects on Kaido's dragon form compared to how it affects normal opponents in the Naruto world.
In certain fanfictions, Naruto's lightning power is used in a more strategic way. He might use it to create diversions. For example, he could make a bright flash of lightning in one area to distract his opponents while he moves to a different position for a surprise attack. He could also use it in combination with his shadow clone jutsu. The clones could be made to carry a small amount of lightning power each, and when they are attacked or dissipated, they release a shock that stuns the enemy.
Some fanfictions use Naruto's sealed power to force him to become more introspective. As he discovers new aspects of his sealed power, he has to think about who he really is and what he wants to do with his power. For example, if the sealed power has a dark side, he has to struggle not to be consumed by it, which makes him grow as a character.
In some fanfictions, Naruto's Asura's power might manifest as enhanced physical strength. He could be able to lift extremely heavy objects or endure more damage in battles. For example, he might be able to take on multiple powerful enemies at once without getting tired easily.
Naruto's power system is based on chakra, which can be used for various ninja techniques like jutsus. Aiz Wallenstein has her own physical strength and sword - fighting skills. If they were in a fanfiction together, Naruto could use his chakra to enhance Aiz's physical abilities. For example, he could transfer some chakra to her to make her faster or stronger for a short time.
Well, it could start with the basic level where the character just has a hint of both bloodlines. They might have slightly increased strength and a bit of chakra control. As they train or face difficult situations, their power levels could gradually increase. For example, in a fight against a strong enemy, they could unlock a new level of their combined bloodline power.
Well, Naruto's Cyclops power in fanfiction could be different in many ways. Firstly, the appearance of the power might be distinct. The color or intensity of the beam he shoots from his eyes could be altered. Also, the power might be linked to his chakra system in a unique way. Since Naruto has his own chakra - based abilities like the Rasengan, his Cyclops - like power could be combined with his existing skills, which is very different from how the original Cyclops uses his power in the X - Men comics.