At first, his Pokémon would be shocked. They've known Ash as a human trainer, and now he's this powerful psychic Pokémon. The more aggressive Pokémon in his team might see him as a threat to their position in the group. But the loyal ones, like Bulbasaur, would try to understand what happened. Ash, in his new Mewtwo form, would have to use his psychic abilities to communicate in different ways. He might be able to understand his Pokémon's thoughts more deeply, which could either strengthen or strain their relationships depending on how they all adjust.
His Pokémon's reactions would vary greatly. The ones that are used to Ash's physical presence and commands would be thrown off. For example, his flying Pokémon might not know if they should still carry him around. His psychic - type Pokémon in the team, if any, might feel a new kinship with him. Ash would need to re - establish trust and leadership in his new form. Some Pokémon might be scared that he's no longer the Ash they knew, but with time, if he shows that he still cares for them and has the same goals, they could form a new and perhaps even stronger bond.
His Pokémon might be really confused at first. They're used to Ash as a human, so seeing him as a Pikachu would be quite a shock. But some of them, like Pikachu himself, might feel a closer bond since Ash is now in a similar form.
At first, his Pokémon would be startled. They've always known Ash as a human. But then, they would start to adapt. Some Pokémon, like Squirtle, might try to play with Ash in his new form, thinking it's a new kind of game. However, his more loyal Pokémon, like Greninja, would be determined to find a way to turn Ash back. Greninja might use its special bond with Ash to try and communicate with him on a deeper level in this new form, to understand what happened and how to reverse it.
Well, consider Ash starting in the Hoenn region in a fanfiction. The Pokémon in Hoenn are known for their diverse abilities and forms. His Pokémon from other regions might feel a bit out of place at first. But as they explore Hoenn together, they would learn to adapt. His relationship with his Pokémon could become more collaborative as they all face new challenges. For instance, his Pikachu might have to deal with stronger Electric - type Pokémon in Hoenn, which would make it rely more on Ash for training and support. His other Pokémon would also have to learn new techniques to compete, and this shared struggle would deepen their bond with Ash.
His other Pokémon like Charizard would be completely bewildered. Charizard might initially think that this Eevee is just some random Pokémon near its territory. But when it senses something familiar about the Eevee, it would be hesitant and curious. It could try to communicate in its own way, like using small bursts of fire to get the Eevee's (Ash's) attention. The Pokémon that Ash has a closer bond with would be more determined to figure out what's going on and how to help him.
Well, his relationship with Sasuke could be very interesting. Sasuke might see Naruto's fox form as a new level of power to either compete with or respect. Naruto, on the other hand, might be more protective of his friends in his fox form, which could make Sasuke question his own motives. And for his other friends like Shikamaru, he would have to come up with new strategies to work with Naruto in this new form.
His friends would be both amazed and a bit scared at first. Hermione would immediately start researching ways to turn him back. Ron might be more in awe of Harry's new form, but also worried about how dangerous it could be. Their dynamic would shift as they now have to protect Harry in a different way. They might also have to hide his transformation from others who could misunderstand and try to harm Harry.
His relationship with his uncle Iroh would be deeply affected. Iroh has always been a guiding figure for Zuko. If Zuko turns into a dragon, Iroh would be worried but also proud in a way. He would search for ways to help Zuko, and their relationship would become more about Iroh protecting and guiding Zuko in this new and strange form. Zuko, in turn, would rely more on his uncle's wisdom during this time.
When Ben turns into a girl in the fanfiction, his family relationships would be transformed. His parents would initially be confused and concerned. They'd have to protect Ben from any potential discrimination. His sister might be excited to have a 'sister' for a while and would teach Ben about girl - stuff like makeup and fashion. Grandparents might have old - fashioned views but would gradually warm up. The family would also have to deal with how outsiders view their 'new' family member, which would bring them closer together as they face these challenges as a unit.
Inuyasha's relationship with his enemies would also change. Some enemies might underestimate him in his baby form, not seeing him as a threat. However, some might see it as an opportunity to get rid of him once and for all. His friends would have to be extra vigilant in protecting him. And as Inuyasha grows up again in the story, his relationships with his friends would be different because of this experience. They would have a shared memory of taking care of him when he was at his most vulnerable, which could deepen their loyalty and friendship.
His relationship with Kagome would change significantly. Kagome might see Inuyasha in a new light, perhaps more as a sister - like figure at first, but then as she gets used to the new form, there could be a shift in their romantic undertones. With Miroku, Miroku would be more respectful in a different way. He might be less likely to tease Inuyasha in the same way he did before. Sesshomaru, on the other hand, might initially be disgusted or confused by his half - brother's new form, but it could also lead to some interesting developments in their rivalry as Sesshomaru tries to figure out if this new Inuyasha is still a worthy opponent.