Pokemon Celebi Transformation Fanfiction: What are some interesting plot ideas?

One idea could be that Mew and Celebi team up to save a dying forest. Since Celebi has a strong connection to nature and Mew is a very powerful and curious Pokemon, they could use their unique abilities to heal the forest. Maybe there's a dark force polluting the forest, and they have to find the source and stop it.

One idea could be a Vulpix that gets transformed into a different type of Pokemon due to a magical artifact. It then has to learn to adapt to its new form and abilities while trying to find a way to change back. Another plot could involve a trainer who accidentally causes the transformation of their Vulpix and they go on a journey together to figure out how to reverse it.

One idea could be a young trainer discovers an ancient spellbook that has pokemon transformation spells. He accidentally casts one on himself and turns into a Pikachu. Then he has to figure out how to reverse the spell while experiencing the world from a pokemon's perspective.

When Celebi initiates the transformation, it's like a wave of emerald light washes over the target. First, there's a tingling sensation all over the body. Then, the physical features begin to shift. If it's a transformation into a flying - type Pokemon, the back might start to bulge as wings start to form, feathers sprouting out in a flurry. The face would change too, the nose becoming a beak perhaps, and the eyes taking on a different shape and color. Every detail of the transformation can be described in a very tactile way, making the reader feel as if they are witnessing it firsthand. You can also add in the sounds, like a soft whooshing as the transformation energy moves around.

In 'pokemon horror transformation fanfiction', the idea of a Pokemon's body mutating in grotesque ways can be really interesting. Maybe a Bulbasaur with its bulb growing out of control, sprouting thorny vines that seem to have a life of their own and lash out at anything nearby.

One idea could be a trainer who accidentally gets exposed to a strange energy and starts to transform into a Pokemon. They then have to figure out how to reverse the process while also experiencing the world from a Pokemon's perspective.

One idea could be the main character being reborn as a Pikachu and having to navigate the world with its electric powers while making friends with other pokemon. Another could be being reborn as a Eevee and having the unique ability to evolve into any form at will, which causes both envy and admiration among other pokemon. Maybe the reborn pokemon has memories of being a human and uses that knowledge to outwit trainers and other threats.

One idea could be a human accidentally getting bitten by a vampire during a full moon and slowly transforming while struggling to hide it from their family. Another could be a vampire choosing a human to transform as a way to save them from a terminal illness. And a third could be a group of humans being hunted by vampires and one of them getting turned and having to choose between their old life and their new vampire existence.

One popular idea is a trainer being transformed into a Pokémon. This often leads to interesting adventures as they have to adapt to their new form and abilities. For example, they might learn how to use moves like Pikachu's Thunderbolt from a completely different perspective.

One plot idea could be a story where a trainer forms an unexpected bond with Reshiram. Maybe the trainer is initially afraid of Reshiram's power but over time they learn to work together and understand each other.