One possibility could be a magical encounter. Maybe he stumbles upon a rare and powerful Pokemon or a mystical artifact that bestows him with wings. It could also be a result of some genetic experimentation by a mad scientist in the Pokemon world who targets Ash for an experiment gone wrong (or right, in this case of getting wings).
The wings could be used in combination with his Pokemon's attacks. For example, he could use his wings to create updrafts for Flying - type Pokemon to enhance their attacks. Or he could distract opponents while his Pokemon sneaks up from behind. Also, the psychological impact on his opponents would be significant. Seeing Ash with wings would be unexpected and might throw them off their game, giving Ash an edge in battles.
Ash's loss could lead to a change in his journey. Instead of just aiming for Pokémon battles and championships, he might focus more on self - improvement and understanding his Pokémon better. He could travel to new regions to learn different training techniques or seek out wise Pokémon trainers who can give him advice on how to avoid such losses in the future.
One possibility could be a curse or a blessing from a powerful being. Maybe Naruto encounters a god - like entity during one of his adventures who bestows the angel wings upon him as a way to test his character or give him new powers to face an upcoming threat.
Well, it could symbolize great power. In many fictional concepts, wings often represent strength, freedom, or a connection to something divine. So Naruto having 12 wings might mean he has an extraordinary level of power, perhaps even a connection to a higher realm or a new form of chakra. It could also be a sign of his evolution as a character, making him stand out even more in the Naruto universe.
In some fanfictions, Naruto might get wings and a tail due to a powerful curse or a strange experiment gone wrong. Maybe an enemy used some forbidden jutsu on him that altered his physical form.
Maybe they could be a result of some ancient curse or blessing. For example, Naruto might have accidentally stumbled upon an old shrine during one of his adventures and unknowingly activated a spell that gave him the black angel wings. It could also be related to his Uzumaki heritage, perhaps there's some hidden power within his bloodline that was awakened in an unexpected way, causing the appearance of these unique wings.
Maybe they could be a result of some forbidden jutsu gone wrong. For example, Naruto might have been experimenting with a new form of chakra manipulation that accidentally summoned some dark energy which manifested as black wings.
The fanfiction could focus on Ash's daughter's relationship with her father. Ash could teach her all he knows about Pokemon battles and care. They might go on adventures together, and she could learn valuable lessons from him. For example, how to befriend wild Pokemon or how to strategize in battles. It could also show how Ash has changed as a father compared to his days as a young trainer.
Well, it could be about Ash having a secret power that he's been hiding all along. Maybe it's a special connection to a legendary Pokemon that no one knows about.
Sylveon could play a crucial role in helping Ash understand the Fairy - type Pokémon better. Since Ash has experience with various types, having a Sylveon could expand his knowledge. For instance, Sylveon could show Ash how Fairy - type moves interact with other types in different ways, which would be useful in battles and strategizing.