I'm not sure if there is a specific 'ash no pikachu fanfic' out there. There are countless fanfics in the Pokémon fandom, but this particular one might be hard to find. You could try searching on dedicated fanfic websites like FanFiction.net or Archive of Our Own and use the relevant keywords to see if it exists.
They could start by sharing their favorite things, like Ash sharing his Pokemon training experiences and the female Pikachu sharing her favorite places to play in the wild.
Definitely. The idea of Ash and Pikachu's friendship is very popular in fanfiction. Their relationship is iconic. Fanfictions could tell stories of how they first met and how that initial connection grew into an unbreakable bond. It could also include side characters from the Pokémon world who notice and are inspired by their friendship, like Misty or Brock seeing how Ash and Pikachu always have each other's backs.
In this kind of fanfiction, Ash might find it really hard at first. He's used to being a human trainer, and suddenly becoming a Pikachu would be a shock. He'd have to learn how to control Pikachu's electric powers which he only used to command before.
In a fanfiction, Ash and Pikachu could enter a Pokemon contest where the theme is lemons. Pikachu has to use its skills in a creative way related to lemons. Ash trains Pikachu hard, and they come up with a unique performance where Pikachu zaps lemons to create a spectacular light show. This earns them high marks from the judges and they make new friends among the other contestants.
One possible reason could be that Ash senses a dangerous situation where Pikachu's full power might attract unwanted attention or put them in more danger. For example, if there are powerful and unseen enemies nearby, Ash might hold Pikachu back to keep a low profile.
Ash would be terrified. He is facing a group of Spearow without his most reliable Pokémon by his side. He would also feel disappointed in Pikachu. After all the adventures they've had together, he never expected Pikachu to leave him in such a dangerous situation. He might start to doubt their friendship and partnership.
A common theme is the strong bond between Ash and Pikachu. It's often about their loyalty to each other and how they rely on one another in different situations, like in battles or when exploring new places.
Ash and Pikachu have a deep and special bond. Ash found Pikachu as his first Pokémon. Their love story is one of loyalty. They've been through countless battles together. Pikachu always stays by Ash's side, protecting him and being his most reliable partner. Ash, in turn, takes good care of Pikachu, sharing his food and showing concern for Pikachu's well - being.
One possible reason for Pikachu leaving Ash in fanfiction could be a sense of self - discovery. Maybe Pikachu feels it has reached a point where it needs to explore the Pokémon world on its own terms, without Ash. It could be seeking new challenges or to find its true place among other Pokémon.