Well, he might gain incredible power. The Shinju is a powerful entity in the Naruto universe, so Naruto could potentially have enhanced strength, new jutsu abilities, or even a different form. He could also face new challenges as a result of this new power, like other characters fearing or trying to control him.
If Naruto absorbs the Shinju in a crossover fanfiction, his character development would be quite dramatic. He has always been a character driven by his desire to protect his friends and village. With the Shinju's power, this goal could expand to protecting entire universes if it's a large - scale crossover. He'd start to see the bigger picture and his place in it. However, he might also struggle with the isolation that often comes with great power. People might not understand him as they used to, and he'd have to find new ways to connect with them. His values would be put to the test as well. The power could tempt him to take shortcuts or make decisions that go against his original beliefs, but if he overcomes these temptations, he'd emerge as an even stronger and more noble character.
In some fanfictions, if Naruto absorbs the Shinju, he might gain an incredible boost in power. He could potentially have access to vast amounts of chakra, far beyond what he already has. This new power might allow him to easily defeat his enemies, even those who were previously much stronger than him.
One common theme is power. The shinju is a powerful entity, and when crossed over with Naruto, it often involves the characters either seeking its power or having to deal with the consequences of its power. For example, in many fics, Naruto might be tempted by the shinju's power to achieve his goals more quickly.
Power is a common theme. Writers often explore how the addition of the shinju's power or its influence can change the power dynamics in the Naruto world.
Well, if Naruto absorbs the Juubi in a crossover fanfiction, he would likely become extremely powerful. His already formidable chakra reserves and abilities would be enhanced to a whole new level. He might gain new jutsu or the ability to manipulate the world in ways he couldn't before. Maybe he could even use the power of the Juubi to achieve peace in the ninja world more easily.
One unique element is the combination of Naruto's ninja abilities with the mysterious power of the Shinju. It creates a whole new set of powers and abilities for the characters. For instance, Naruto might gain the ability to control the Shinju's life - giving energy in addition to his normal chakra powers.
Well, one possible consequence could be that he gains some sort of super - power. Since the Shinju is a very powerful and mysterious entity in the Naruto universe, consuming it might endow Naruto with abilities beyond his normal limits. Maybe he could gain control over new types of chakra or even have a better understanding of the origin of all things in the ninja world.
He might be desperate. Maybe there is a great threat to the ninja world that can only be defeated by the power of the Shinju. Naruto, being the hero he is, decides to take the risk of eating it in order to gain the power needed to save everyone.
Well, if Naruto absorbs Kaguya in a crossover fanfiction, it could drastically change the power balance. Naruto already has a lot of power, and adding Kaguya's abilities would make him nearly invincible. It might also change his relationships. His friends could be in awe or a bit scared of his newfound power. And it would surely change the way he faces future enemies. Instead of just fighting, he could potentially just overpower them with his new combined abilities.