Another fanfic could be set in a school environment. Ash is a new student and Rina is the popular girl. At first, they don't get along, but when they are paired up for a project, they discover they have a lot in common and start to like each other more than they expected. They face some challenges from other students who are jealous of their newfound relationship.
One idea could be a story where Ash and Rina are on an adventure in a magical forest. They encounter various mythical creatures and have to work together to find their way out. Maybe they start as strangers but gradually form a strong friendship throughout the journey.
To write an Ash x Rina fanfic, start with an interesting opening. You could start with a conversation between them that grabs the reader's attention or a dramatic event that involves both of them. Then, build their relationship gradually. Don't rush into making them fall in love right away. Show their growth and development as individuals and as a couple. Use descriptive language to bring the story to life, like describing the places they go and the emotions they feel.
Maybe in the fanfic, a mad scientist creates a device that accidentally swaps Ash's essence with Mew's. As Mew - in Ash's body - Ash has to figure out how to reverse the process while also dealing with Team Rocket, who notice something very strange about 'Ash'. Meanwhile, the real Ash, in Mew's form, tries to use Mew's abilities to stop the scientist from causing more chaos.
In a fanfic, Ash could be turned into a vampire by an ancient, powerful Pokemon with vampiric abilities. This would completely change his relationship with his other Pokemon. Some might be scared of him, while others would stay by his side. He would then have to learn to control his vampire powers and instincts in order to continue his journey. For example, he'd need to figure out how to be in the sunlight without getting burned as he travels from place to place.
One idea could be that Ash and Misty visit Unova for a Pokemon tournament. They meet new friends and face new challenges together. Misty could use her water - type Pokemon in creative ways against the Unova Pokemon's unique types.
A possible plot for an 'Ash into Mewtwo' fanfic is that the transformation is a result of a wish granted by a magical Pokémon. Ash, now in Mewtwo's body, decides to use this opportunity to understand Mewtwo better. He travels to the places Mewtwo has been, meets the Pokémon Mewtwo has interacted with, and tries to solve the mysteries surrounding Mewtwo's creation. Along the way, he also has to face the consequences of having such a powerful form, like being hunted by Team Rocket who want to use him for their evil plans.
In the fanfic, Ash could enter a major coordinator competition where he faces off against some of the toughest opponents. He might struggle at first because he's used to traditional Pokemon battles. But as the competition progresses, he starts to understand the nuances of coordinator battles better. His friends could also play important roles, like Misty giving him advice on how to make his Pokemon's water - based attacks look more appealing, and Brock helping with Pokemon health and grooming to ensure they look their best during the shows.
One idea could be that Ash is betrayed by his so - called friends in the Pokémon world. They might be jealous of his status as the Chosen One and team up against him. For example, Gary could spread false rumors about Ash, causing other trainers to doubt him.
One idea could be that Ash uses his unique battle style which he has developed over his journey to create a really challenging gym. He might include Pokémon from all the regions he has visited in his gym battles, making it a diverse and exciting experience for trainers. For example, he could have Pikachu lead the charge as always, but also include some of his less common Pokémon like Heracross or Gliscor.
Well, if Ash joins Team Rocket in a fanfic, it would be a huge shift in the Pokemon world. His friends, like Misty and Brock, would be shocked. They might try to rescue him. Ash, on the other hand, could initially be attracted to the idea of a new adventure with Team Rocket. He could see them as underdogs in a way, always failing but still trying. But as time goes on, he'd start to see the problems with their way of doing things.
One idea could be that Ash sacrifices himself to save his Pokémon during a really intense battle against an extremely powerful and evil Pokémon. Another might be related to a disease spreading in the Pokémon world that Ash contracts and unfortunately doesn't survive. Maybe in a fanfic, he gets caught in a natural disaster in a far - off region while on a journey and perishes.