Perhaps in the fanfiction, a female Mewtwo is being hunted by an evil organization. Ash hears about it and decides to protect her. They form a special bond during their escape. The Mewtwo then starts to learn about Ash's world and the different types of Pokemon. They team up to defeat the evil organization and the Mewtwo decides to stay with Ash to explore more of the Pokemon world.
One idea could be that Ash discovers a female Mewtwo in a hidden part of a forest. She's initially scared of humans but Ash manages to communicate with her using his bond with Pokemon. They go on a journey together to find a place where she can live in peace, away from those who might want to use her powers.
A possible plot is that Ash, while in Mewtwo's form, is hunted by those who fear Mewtwo's power. He has to use his own knowledge of friendship and teamwork, which is so characteristic of Ash, to convince the people and Pokemon around him that he's not a threat. This could lead to some really cool battles where Ash, in Mewtwo's body, shows his unique fighting style combined with Mewtwo's strength.
One idea could be that Mewtwo and Ash are forced to team up to save the Pokemon world from a new, powerful and evil threat. They start off distrusting each other due to their differences, but as they face challenges together, they begin to understand and respect one another.
One idea could be that Ash discovers a wounded Mewtwo and nurses it back to health. As they spend time together, they form an unbreakable bond that challenges the way both Pokemon and humans interact. Another plot could involve Mewtwo using its powers to help Ash reach a new level of Pokemon training. For example, it could allow Ash to experience telepathic communication with his Pokemon, enhancing their battle strategies.
Another interesting plot would be her teaming up with a young trainer. The trainer might initially be afraid of her, but as they go on adventures together, they learn to trust each other. She could use her unique abilities to help the trainer in battles and in solving mysteries in the pokemon world. For example, she might be able to communicate with other pokemon in ways that normal trainers can't, which could lead to uncovering secrets about ancient pokemon or hidden locations. This would not only strengthen their bond but also show her growth as a character who is no longer just an outcast but a valuable part of a team.
A possible plot could be that Mewtwo, in an attempt to protect Ash from a powerful and mysterious enemy, undergoes a self - imposed TF. This transformation gives Mewtwo the ability to access a hidden power within itself. Ash, on the other hand, has to figure out how to communicate with this new - formed Mewtwo and together they face the common foe. Throughout the story, their relationship evolves as they learn more about each other's capabilities.
One idea could be that Ash and Mewtwo form an unexpected bond. Mewtwo, being so powerful, could initially be distrustful of Ash. But Ash's pure heart and determination slowly break through Mewtwo's defenses. They might go on a journey together to stop a new evil threat that is targeting Pokemon with strong psychic powers. Another plot could involve Mewtwo using its powers to help Ash understand some of the mysteries of the Pokemon world that he has been curious about for a long time.
A possible plot could be that an evil organization creates a special diaper for Mewtwo which is actually a mind - control device. Mewtwo has to struggle against the control while trying to figure out how to remove the diaper. Or perhaps Mewtwo discovers a group of baby Pokemon who are being mistreated because they are always in dirty diapers. Mewtwo uses its powers to clean and care for them, and in the process, learns about the value of kindness and nurturing.
One idea could be a story where Mew and Mewtwo team up to save the Pokemon world from a new, powerful and evil artificial Pokemon created by humans. They have to overcome their differences first, as Mewtwo still has some resentment towards humans and Mew is more open - minded.
One interesting storyline could be Ash befriending Mewtwo in a more in - depth way. Maybe Mewtwo decides to travel with Ash and his team, and they face challenges together. Ash could help Mewtwo understand the true meaning of friendship and trust, which Mewtwo has always struggled with due to its creation and past experiences.
A possible plot is that Ash is on a journey to a mysterious place that is said to be Mewtwo's lair. Along the way, he meets various Pokémon and trainers who have either had encounters with Mewtwo or know something about it. When he finally reaches Mewtwo, Ash doesn't try to capture it forcefully. Instead, he shows Mewtwo the beauty of the Pokémon world and the relationships between different Pokémon and trainers. This makes Mewtwo intrigued and willing to be captured by Ash.