What could be the plot in a fanfiction about Ash, Haruka, and Hikari where there is a sense of betrayal?

Well, one possible plot could be that in the Kalos region, Ash makes a new powerful rival. Haruka, being in Kalos for some reason, gets influenced by this rival's charm and power. In Alola, Ash discovers that Haruka has been secretly helping this rival against him, thus feeling betrayed. Maybe the rival promised Haruka something she couldn't resist, like a rare Pokémon or a chance to become a top - tier trainer in a different way.

The writer can also use flashbacks. Show the good times Ash, Haruka, and Hikari had before the betrayal. Then contrast it with the current situation where there is tension and mistrust. This will make the betrayal more impactful for the readers as they can see how far the relationships have fallen.

Well, they could be betrayed by a new acquaintance in a strange town they visit during their travels. This new person could pretend to be friendly, but then steal their Pokemon or important items.

One possible scenario is that Greninja is tricked into believing that Ash is endangering its kind. So it decides to turn on Ash. Haruka, on the other hand, having known Ash for a long time, might try to convince Greninja of Ash's true nature. However, Greninja's loyalty is so shaken that it doesn't listen easily. In the end, Ash has to prove his worth and friendship to Greninja all over again.

The antagonist could be a powerful and devious Team Rocket member who has infiltrated the Kalos and Alola regions. This member could manipulate Haruka, perhaps by blackmailing her with something from her past in Kalos. In Alola, the Team Rocket member uses Haruka to get to Ash, making her betray Ash without really wanting to.

In fanfiction, a story of Ash, Haruka (May in the English version), and Dawn could involve betrayal and hurt in many ways. For example, perhaps Ash makes a promise to both Haruka and Dawn about their Pokémon journey together, like he'll always be there to support them in battles and training. But then, he might break that promise by suddenly leaving them for a more 'glamorous' opportunity in another region without any prior notice. This would make them feel betrayed and hurt, as they relied on him not just as a friend but also as a partner in their Pokémon adventures.

When writing about Ash, Haruka and Greninja's betrayal in fanfiction, you can start with a normal day in their journey. Then, something unexpected happens that leads to Greninja's change of heart. You need to build up the tension and drama. Use dialogue effectively to show the conflict between the characters. For instance, the conversations between Ash and Greninja when the betrayal occurs. And Haruka can be the mediator or the one who takes action to fix things. Also, think about the setting and how it can affect the story. A spooky forest or a mysterious cave might add to the atmosphere of betrayal.

Another interesting topic could be Ash Haruka's family background. You could delve into their family's history, how it has influenced them, and any secrets or traditions within the family. This would add depth to the character and create an engaging fanfiction story.

In a fanfiction, perhaps Clair betrays Ash because she believes he's not a worthy trainer. She might think that Ash's methods are too haphazard and that he's endangering the Pokemon world. So, she teams up with an organization that wants to control the Pokemon trainers, leaving Ash feeling abandoned and betrayed. This could lead to Ash having to prove himself even more to the Pokemon community and also having to face Clair in a big showdown later on.

In such a fanfiction, perhaps Ash betrays his friends for power. He might be lured by an evil organization with the promise of rare Pokémon or ultimate power, and in the process, turns his back on Pikachu and the others.