One possible fanfiction could be about Ash and Serena going on an adventure specifically to find a rare pink Butterfree. Maybe they hear rumors of a special meadow where these pink Butterfree are sighted. Along the way, they face challenges like wild Pokémon and difficult terrains. Ash's determination and Serena's strategic thinking help them get closer to their goal. When they finally find the pink Butterfree, it's a magical moment, and they learn some valuable lessons about friendship and the beauty of nature.
It could be that the pink Butterfree is actually a transformed Pokémon. In the fanfiction, it could be a Pokémon that was experimented on by an evil scientist and turned into this pink Butterfree. Ash and Serena have to figure out how to turn it back to its original form. Along the way, they discover the scientist's lair and have to battle his other creations. This would be an exciting adventure full of mystery and action.
One possible plotline could be that Ash and Serena are on a journey and Butterfree plays a crucial role in guiding them through a difficult forest. Maybe Butterfree's unique abilities, like its powder or its flight skills, help them overcome obstacles like strong winds or wild Pokémon. It could also be that Butterfree has some sort of connection to a special place that Ash and Serena are trying to reach, perhaps a place full of rare Pokémon or a beautiful meadow.
They could also develop their relationship through exploration. If they discover a new and mysterious place, Butterfree can be the one to first scout the area. Ash and Serena then follow based on Butterfree's findings. They can then share their excitement and awe about the new discovery, which would bring them closer together as a team.
Pikachu is a very likely candidate. It's Ash's most iconic Pokemon and has a deep bond with him. Whenever Ash is in trouble, Pikachu often steps up to protect him.
Ash could be a Pokémon trainer with a different starting point in this fanfiction. Born in 1987, by 1997 he might have already made a name for himself in local Pokémon battles. He could have a team of Pokémon that he rescued from difficult situations, like a Charmander that was abandoned by its trainer. His story could revolve around giving these Pokémon a second chance and proving that Pokémon don't need to be 'perfect' to be strong.
The impact of Ash's loss in the fanfiction could extend beyond just himself. His Pokémon might also feel demoralized. However, this could also be an opportunity for them to grow stronger together. Ash could start training more intensively, seek new training methods, or even try to catch new Pokémon to strengthen his team.
If we consider the common growth pattern in the Pokemon series, Charmander evolving into Charmeleon could be an early evolution in the fanfiction. Since Charmander has a clear evolution line and Ash has a strong bond with it, it would make sense for it to be one of the first to evolve, perhaps due to a tough battle or a special encounter that accelerates its growth.
Ash's loss could lead to a change in his journey. Instead of just aiming for Pokémon battles and championships, he might focus more on self - improvement and understanding his Pokémon better. He could travel to new regions to learn different training techniques or seek out wise Pokémon trainers who can give him advice on how to avoid such losses in the future.
Maybe it's a legendary Pokemon in disguise. In some fanfictions, legendary Pokemon often play important roles. It could give Ash the egg as a test or because it senses that Ash has a pure heart. Another possibility is that it could be a young trainer who can't take care of the egg anymore and trusts Ash to do a good job.