Naruto's character would likely become more patient. Dealing with Pokemon, which are different from his usual ninja foes, would require a different approach. He would have to understand their behaviors and needs, which would make him more patient and empathetic. Also, his leadership skills from the Naruto series would be enhanced as he might lead groups of Pokemon trainers in this fanfiction world.
If Naruto becomes a God in Pokemon fanfiction, his character would experience a significant transformation. His already strong willpower would be amplified, and he would be more determined to protect the Pokemon world. He might develop a more profound sense of responsibility towards the Pokemon and their habitats. His relationships with other characters in the fanfiction, whether they are trainers or Pokemon themselves, would also change. He would be seen as a powerful and benevolent figure, and his interactions would be based on his new status as a God. This could lead to him making new alliances and facing new challenges that test his character in ways that are different from his adventures in the Naruto universe.
Well, when Naruto becomes the Death God in fanfiction, his relationship with Sakura would change. She might be more hesitant around him, as his new power is so otherworldly. And his bond with Kakashi would also be different. Kakashi, being a wise ninja, would try to guide Naruto in using this power responsibly. Naruto's relationships with the villagers would shift too. Some might worship him, while others could be suspicious of his new - found power.
He might become more brooding. The new powers and the vampiric nature could make him a bit more withdrawn as he tries to understand and control his abilities. But his core of kindness would still be there.
He'd become more responsible for the whole world perhaps. Since the Avatar has to keep balance everywhere.
Naruto's character would gain a new sense of responsibility. As a Green Lantern, he'd have to abide by the Corps' rules and uphold justice on a much larger scale. This might make him more serious at times, but his core of being a fun - loving and determined person would still remain. He'd also learn to work in a team with other Green Lanterns, which could be different from his experience with his ninja teams as they come from diverse backgrounds.
He would become more isolated. As the God of Destruction, people would be afraid of him, and his friends might not understand him anymore. Naruto is used to being the hero, but in this new role, he'd be seen as a threat.
He would likely become more detached from his emotions. As the God of Destruction, Naruto might view things from a more 'big picture' perspective that doesn't take into account individual lives as much. His once - bright and friendly personality could be overshadowed by a more stoic and indifferent one.
If Percy Jackson becomes a god in a crossover fanfiction, his character would experience a significant transformation. He has always been a hero who fought for the underdog. But as a god, he might have to make difficult decisions that could go against his old principles. His view of right and wrong could become more nuanced. He would also have to deal with the envy and fear of those around him. His mortality - which was a big part of his identity - would be gone, and he'd have to redefine himself in the context of immortality. His sense of time would change, and he might start seeing things from a much longer - term perspective. All these changes would make his character much more complex and different from the Percy we knew as a demigod.
He could become less impulsive. Seeing Himawari's more calculated and careful approach to things, Naruto might learn from her. He may start to think things through more before acting, just like he admires in Himawari. Also, he would be more of a cheerleader for her, boosting her confidence which in turn would change his own character to be more of an encourager in general.
If Harry Potter becomes part of a Pokemon fanfiction, his life would change in many ways. Firstly, his daily routine would be different. Instead of going to magic classes, he'd be out in the wild looking for Pokemon. His friends might also change as he'd befriend other Pokemon trainers. His relationship with magic might even be affected. He could start using magic in new ways related to Pokemon, like using spells to communicate with them. And his sense of adventure would be redirected towards exploring the different regions in the Pokemon world.
His sense of justice could become more absolute. As a god, he may not tolerate any form of evil. He would strive to purge the ninja world of all dark elements. His power would allow him to enforce his version of justice, which could be both a good thing in terms of eliminating real threats, but also a bit scary as it might limit the free will of some ninjas who are not truly evil but just made some mistakes.