One idea could be that Korrina and Ash team up for a special Pokemon tournament. They train together, with Ash sharing his experiences from his previous travels and Korrina teaching Ash some new fighting - type Pokemon moves. Their Pokemon also form unique bonds during the training process.
One idea could be Korrina and Ash teaming up for a special Pokemon tournament. They train together, with Korrina teaching Ash some of her unique battle techniques. Another plot could involve them exploring a new, mysterious region and discovering new Pokemon species. Maybe they find a rare Pokemon that is in danger and they have to protect it.
One possible plot could be that Ash is transformed into a rare and powerful Pokemon like Mewtwo. He then has to navigate the Pokemon world from a different perspective. He discovers new abilities and strengths he didn't know about before. And he uses his knowledge of being a trainer to communicate with other Pokemon and form alliances to face the challenges that come his way.
One possible plot could be Ash being chosen by Arceus to save the world from a new, mysterious threat that even the Legendary Pokemon are powerless against. He has to travel to different regions and form bonds with various Legendary Pokemon along the way, using their combined powers to face the danger.
One reason could be a power struggle. If there was a rare and powerful Pokémon at stake, Ash might be tempted to betray Korrina to get it for himself. In the Pokémon world, power and rare Pokémon are highly coveted.
Unique Pokemon battles. If the fanfic showcases Korrina's battles in a new and exciting way, it can be really interesting. For instance, her Lucario using unexpected moves against powerful opponents.
A great plot might be that Ash accidentally stumbles upon a hidden realm where Legendary Pokemon live in seclusion. His presence disrupts their normal life, but instead of being angry, they are intrigued by this human. Ash shows them his love for Pokemon through his actions. As a result, one by one, the Legendary Pokemon start to follow him around. His harem grows, and with their combined powers and his leadership, they start to take on challenges like saving other Pokemon from a new and dangerous disease that is spreading and is said to be related to an ancient curse that only the Legendaries can help break.
One possible plot could be that Ash finds a Riolu as his starter pokemon. Riolu is initially very shy and distrustful of Ash. But as they go on adventures together, Riolu starts to open up. They face challenges like battling against Team Rocket who tries to steal Riolu for its potential power. Ash has to train Riolu not just in battle skills but also in trusting him completely. This journey of building trust and growing stronger together could be a great fanfiction plot.
In this fanfiction, if Ash turns into a pokemon, perhaps he becomes a Charmander. He could struggle with being in a different form. He might have to adapt to the life of a fire - type pokemon, facing challenges like being weak against water - type attacks and trying to find a way to change back while still having adventures with his friends, who now have to protect him in a different way.
I'm not sure specifically if there is an existing fanfiction with that exact title, but it's a very possible concept in the Pokémon fanfiction community. Writers might explore Ash's darker side in relation to Korrina, perhaps due to a conflict over different ideologies within the Pokémon world, like how to train Pokémon or what the true purpose of battling is.
Another possibility is that the fanfic is a romantic story involving Korrina. She might meet a trainer from another region and they fall in love while sharing their Pokemon experiences. They could go on adventures together, facing tough opponents and discovering rare Pokemon along the way.