Well, one interesting xyz story could be about how xyz overcame great difficulties to achieve something amazing. Maybe xyz was in a tough situation but with determination and creativity, they found a solution.
I'm not sure if there are official game hacks for XYZ Kingdom Story. Using hacks is often against the game's terms of service and can lead to penalties. It's better to play the game fairly.
In fanfiction, if Ash were to die in Pokemon XYZ, it would be a huge shock to the Pokemon world. His friends like Pikachu would be devastated. Maybe Team Rocket would even feel a strange sense of loss. It could lead to a whole new storyline where his friends try to avenge his death or carry on his legacy of becoming a Pokemon Master.
May could fit into Kalos by participating in local Pokemon events. For instance, she could enter the Pokemon showcases in Lumiose City. Her unique style and skills would make her stand out, and she'd become a part of the Kalos Pokemon community.
Their bond could grow through shared experiences. As they face challenges together in Kalos, like dealing with difficult terrain or strong wild Pokémon, they'll rely on each other more. This will strengthen their connection.
One idea for a fanfiction could be that Ash travels to Kalos with his Infernape. There, Infernape discovers new moves or abilities inspired by the Kalos environment. It could be something related to the fairy - type energy prevalent in Kalos, which gives Infernape an edge in battles against certain opponents.
He could die in a battle against a very powerful and evil Pokemon. Maybe a new, extremely strong legendary Pokemon that he underestimated, and it managed to land a fatal blow.
You can try fanfiction websites like FanFiction.net or Archive of Our Own (AO3). They have a large collection of fan - created stories, and you're likely to find 'ash xyz fanfiction' there. Just use their search functions and type in relevant keywords.