Ash might hate Alola fanfiction because it doesn't capture the essence of what Alola meant to him. Alola was a special place with unique Pokémon, a different kind of Pokémon training style, and great friends. If the fanfiction fails to show that accurately, for instance, by focusing too much on unimportant details or creating false drama, he would probably not like it.
Maybe he just doesn't like how some fanfictions misinterpret his experiences in Alola. Fanfictions can often take a lot of creative liberties that might not sit well with the character as he was originally portrayed.
It could be that the Alola fanfiction he's encountered tends to distort the real relationships he had in Alola. For example, if they change his friendships with his Pokémon or his human friends in a way that he feels is wrong. He might also dislike it if the fanfiction makes him do things that are out of character for him. In the real story in Alola, he had a certain journey and growth, and if the fanfiction goes against that, it's understandable that he would not be a fan.
Maybe Ash has a particular view of his own character and the way Cynthia is portrayed in fanfiction doesn't align with his idea. He might feel that the fanfiction distorts their characters or the relationship between them in some way.
Maybe in the fanfiction, Chloe has some traits or actions that Ash doesn't like. For example, she could be too bossy or interfere with Ash's goals in the story.
Maybe Ash is portrayed in a way he doesn't like in Serena fanfiction. For example, the stories might change his character traits or put him in situations he wouldn't be in the original series.
Maybe Ash hates Pokemon fanfiction because it often goes against the official storylines and characterizations he is used to in the real Pokemon world. Fanfiction might distort the relationships between characters or create out - of - character situations for him.
Maybe she has her own vision of their relationship and the fanfiction distorts it in ways she doesn't like.
One possible reason could be a miscommunication. Maybe Serena did something that Ash misinterpreted. For example, she might have made a decision about their pokemon journey without consulting him, and Ash, being independent, took it the wrong way.
Maybe Ash's character in the original work has a certain fixed image, and some fanfics about Serena deviate from this image he represents, so he hates it.
It could be that Ash believes Charizard's experience and strength can be useful in Alola. There might be some tough challenges in Alola that only Charizard can help him with. Also, Ash might want Charizard to experience a new environment and different Pokémon species.
Well, in Alola, the battle environment is different. Ash Greninja has to adapt to the new battle rules like Z - Moves. It may start by observing local battles and learning from them. It could also adapt to the more friendly and less intense battle atmosphere compared to other regions. This means it might have to change its battle strategy a bit, not always going all - out from the start. And it might interact with different types of Pokemon that are native to Alola, which could lead to new friendships or rivalries, further shaping its adaptation to the Alola environment.
Well, it's hard to pinpoint a specific one. But if you search with relevant keywords on fanfiction platforms, you'll likely come across many stories where Ash has an Alola Pok茅mon. Some authors create unique scenarios and adventures for Ash with these Pok茅mon.