It would be really exciting. In the fanfic, Ash might be a bit hesitant at first because he loves Pikachu as it is. But when Pikachu decides to evolve, it could be a powerful moment. Maybe Pikachu evolves to save Ash from a super - strong enemy. And as a Raichu, it would have new abilities and a different appearance, which could lead to new adventures for Ash and his evolved Pokemon.
Well, in such a fanfic, the evolution could be a very emotional journey. Pikachu has been with Ash for so long as Pikachu. The evolution might be triggered by Pikachu's strong desire to protect Ash better. Once it becomes Raichu, it might struggle a bit with its new power at the beginning. Ash would need to help it get used to the changes. And they would face different challenges in the Pokemon world, like dealing with trainers who are intimidated by Raichu's new strength.
A fanfic about Pikachu evolving into Raichu could explore many aspects. Firstly, the reason for the evolution could be complex. It could be due to some special item or a unique experience. When it evolves, the relationship between Ash and Raichu would change. They would have to adapt to a new dynamic. Raichu would be faster and stronger, which could open up new storylines. For example, they could enter a more advanced Pokemon league where stronger opponents await. Also, the other Pokemon in Ash's team might react differently to Pikachu's evolution, some might be excited while others could be a bit jealous.
It could be portrayed as a moment of great transformation. Ash might be hesitant at first, but realizes the potential of a Raichu. The evolution could be triggered by a very powerful opponent that makes Pikachu see the need to evolve. Then, as Raichu, it could start showing off new moves and a more confident attitude, which Ash would have to get used to.
Some fanfictions might take a more emotional route for Pikachu's evolution in Pokemon Masters. Suppose Pikachu witnesses the endangerment of its friends or the whole Pokemon community. This sense of responsibility and the need to become stronger could drive it to evolve. It's a common trope in fanfiction to have a character's evolution be linked to their emotional and moral growth.
The fanfic could show Pikachu evolving during a big battle. When the situation seems hopeless, Pikachu might suddenly feel a surge of energy and start to evolve. As it evolves into Raichu, the battlefield would be filled with a bright light. And then Raichu would come out, more powerful and ready to turn the tide of the battle.
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.
Well, Pikachu could evolve due to a new type of energy in Pokemon Masters. This energy might be related to the sync pairs or the special powers in the game. For instance, if Pikachu forms a super - strong sync pair with a trainer, it could gain enough power to evolve.
Well, there might be a fanfiction where Pikachu and Raichu team up to face a powerful new Pokemon threat. In this story, Pikachu's speed and cuteness combined with Raichu's strength could make for an exciting plot. There could also be a fanfiction that focuses on the relationship between a trainer and their Pikachu and Raichu, and how they all grow together.
Well, a 'pokemon sad raichu fanfic' could be about a sad Raichu. Maybe it's about Raichu being separated from its trainer, feeling lonely and left out. It could also be that Raichu has lost in battles too many times and has become sad and lost its confidence.
I'm not sure specifically what that particular 'pokemon rejected raichu fanfic' is about. It could be a fan - made story where Raichu is involved in some way that didn't meet the expectations or standards of the Pokemon fanfic community. Maybe it has an unusual plot, like Raichu being rejected by its trainer in a really heart - breaking way and then going on a journey to prove itself.
It could speed up his journey. With Raichu's greater power, Ash might be able to win battles more quickly and move on to more challenging regions or opponents.
One common theme is growth. Since Raichu is an evolved form of Pikachu, fanfics might explore Pikachu's journey towards evolving and how Raichu plays a role in that.