Ash's relationship with other trainers can be quite complex. Some trainers might look up to him as a sort of legend in the making. They might believe that his connection to Legendary Pokemon gives him an edge in battles and training. However, this can also lead to some trainers feeling inferior. There could also be trainers who are skeptical. They might think that Ash is just using his 'raised by Legendary Pokemon' story as a way to gain attention. And Ash has to constantly prove himself not just because of his skills, but also to show that he's not just relying on his special upbringing. He has to build relationships based on mutual respect, which can be a challenge given the perception that others have of him.
Well, first of all, other trainers might be hesitant to approach Ash. They could think that he's on a whole different level because of his upbringing. But on the other hand, there could be some trainers who are really curious and want to befriend him to find out more about his experiences with Legendary Pokemon. And those who are more competitive might see his special background as an unfair advantage and be a bit resentful. However, Ash himself might try to downplay his upbringing and just focus on building normal friendships and rivalries with other trainers, but it's not always easy because of the reputation that comes with being raised by Legendary Pokemon.
It makes his relationship with other trainers rather unique. Other trainers might view Ash with a mix of awe and envy. Since he was raised by Legendary Pokemon, they may assume he has some special training methods or insights. Some trainers might be eager to learn from him, while others could be intimidated and see him as a rival to be defeated at all costs.
Well, other trainers would probably be both jealous and in awe. Some might try to befriend Ash just to get closer to the legendary pokemon. Others, especially those with a competitive streak, would see Ash as a huge threat and might be less friendly towards him.
His relationship with Pikachu would become quite different. Pikachu might have to take on a more protective role. Instead of Ash being the one in charge, Pikachu would be looking out for Eevee - Ash. They would still have a strong bond, but it would be based more on Pikachu's guardianship now.
Often, Ash has to complete a quest. In a fanfic with Ho - Oh, Ash might have to find three special feathers scattered across the region. These feathers are said to be the key to summoning Ho - Oh. As he embarks on this journey, he faces many challenges and overcomes them with his existing Pokemon team. Once he collects all the feathers, Ho - Oh appears and, impressed by Ash's determination, decides to fight alongside him. Another way is through a prophetic vision. Ash might have a dream that tells him how to find and bond with a Legendary like Entei, and he follows this vision to make it happen.
His relationship with Pikachu might become more competitive at first. Since Ash already has a strong starter in Charmander, Pikachu might feel the need to prove itself more. But over time, they could learn to work together better, with Pikachu using its electric attacks to complement Charmander's fire attacks in battles.
Well, usually trainers are in control. But when they turn into Pokemon, they become the ones being controlled in a sense. For example, a trainer who becomes a common Pokemon might be at the mercy of stronger Pokemon or trainers who want to capture them.
It could be Mew. Mew is known for its ability to transform and has a very mysterious nature. If Ash was Mew's son, he might inherit some of that mystery and the power to communicate with Pokemon in unique ways.
He can become more confident in his abilities. Since Legendary Pokemon are so powerful, if Ash can form a bond with one and work together successfully, it boosts his self - assurance. In these fanfictions, he might start to believe more in his own intuition and skills as a trainer. For instance, if he manages to communicate with and help a Legendary like Celebi, he'll see himself as someone capable of handling extraordinary situations.
One popular plot twist could be that Ash discovers he has a special power given to him by the Legendary Pokemon that raised him. For example, he might be able to communicate with all Pokemon telepathically. Another could be that the Legendary Pokemon that raised him is in danger, and Ash has to use his unique bond with it to save it from an evil organization. And sometimes, there's a twist where Ash's real family is somehow connected to the Legendary Pokemon world, and his upbringing by the Legendary Pokemon was part of a bigger plan to reunite his family.
Obviously, the Legendary Pokemon would be a main character. It could be a Pokemon like Mewtwo, who is often depicted as having a complex personality. It might start off as a mysterious and powerful entity that Ash has to befriend or battle against.
Well, it could mean that in a Pokemon fan - created story, the character Ash is being brought up or developed in a certain way. Maybe the fanfiction writer has a unique idea about Ash's upbringing, like giving him a different family background or experiences compared to the official Pokemon story.