If Pikachu evolves in a fanfiction, it might have an impact on Ash's relationships with other characters. Some trainers might see Ash as a more serious threat now that his Pikachu has evolved. Others might be jealous or try to figure out how he achieved such a transformation.
One possibility is that Ash has to quickly adjust to Raichu's new power levels. Raichu might be a bit more independent compared to Pikachu, which could lead to some initial clashes in their teamwork. But in the end, they could become an even more formidable team, with Raichu's increased strength allowing them to take on tougher opponents in battles.
Well, if Ash's Pikachu evolved into Raichu in fanfiction, it could change the whole dynamic of their journey. Pikachu's evolution might bring new power levels and moves, making battles easier or more complex. Ash would need to adjust to the new Raichu, and their bond might be affected. Maybe Pikachu's cute factor would be replaced with a more intimidating Raichu presence. It could also lead to new storylines where Ash has to deal with the jealousy of other Pokemon or trainers who are envious of his powerful Raichu.
In a fanfiction about Pikachu evolving, it might happen because of a strong emotional bond. Suppose Pikachu is trying to protect Ash from a great danger. In that moment of extreme self - sacrifice and love for Ash, it evolves. This evolution could lead to a whole new dynamic in their relationship. Ash would have to learn how to train a Raichu instead of a Pikachu, and Raichu might be more independent but still deeply loyal to Ash.
Well, Ash would be devastated. Pikachu has been his closest companion throughout his Pokémon journey. He might go on a desperate search for Pikachu, traveling to all the places they've been together. This could lead to Ash encountering new Pokémon and trainers along the way.
In the 'Ash becomes a Pikachu fanfiction', Ash could have dreams where he is actually a Pikachu. This could lead to some really interesting adventures. For example, he wakes up in a dream as a Pikachu and has to figure out how to use his new form to battle. He might also make new Pikachu friends in his dream world and learn their unique ways of living. This could then have an impact on how he treats Pikachu in the real world when he wakes up, like being even more protective and affectionate towards his beloved Pikachu.
Perhaps in this fanfiction, Ash meets Pikachu not as a novice trainer but as someone who has already had some basic training knowledge. So when he meets Pikachu, he is more confident in approaching it. He might even have some special items with him that help him bond with Pikachu faster, like a unique type of Pokéball or a charm that Pikachu is attracted to. This would change the dynamic of their relationship from the very beginning compared to the official story.
One possible plot could be that Pikachu is exposed to a rare form of electric energy in a thunderstorm that's charged with some mysterious power. This could start the evolution process. It might struggle at first, not understanding the changes its body is going through. As it evolves, it could gain new abilities like enhanced speed and a more powerful electric attack. And it might have to face new challenges in battles, as opponents are now more cautious of it.
One possibility is that Pikachu's discovery of Ash's Pokemon instincts leads to a new training method. Since Pikachu realizes Ash has this special understanding, they could work together to train the other Pokemon more effectively.
In the 'Ash gets a female Pikachu as a starter fanfiction', one possibility is that the female Pikachu could form special bonds with other Pokémon. Since female Pokémon often have different social behaviors, she could befriend different types of Pokémon more easily. This would open up new storylines for Ash, like being able to access areas or get help from Pokémon that he otherwise wouldn't have. Also, she might be more attracted to certain types of Pokéballs or items, which could also add interesting twists to the story.
Well, he might start to see the world from a Pikachu's perspective. For example, he would experience the small size and how everything looks so huge. He could also find it difficult to communicate with his human friends in the normal way since he is now a Pikachu. Maybe he would have to rely on Pikachu's ways of expressing emotions like using electrical signals.