One idea could be exploring the different evolutions of Eevee within a family setting. For example, a young trainer has an Eevee family. One Eevee evolves into Vaporeon because it loves to swim in a nearby lake. Another might evolve into Flareon due to its fiery temper. This can lead to a story about how the family copes with the different personalities and abilities of each evolved form.
One possible fanfic could be about a young trainer who chooses Eevee as their starter in a world where Eevee is an underrated choice. The trainer could face discrimination from other trainers who think more traditional starters like Charmander or Squirtle are better. But as the story progresses, the Eevee shows its unique abilities and evolves into a powerful and unexpected form, surprising everyone.
Another way is to give the Eevee family members different goals or dreams. An Eevee might dream of evolving into Umbreon to protect the family at night, while another wants to stay as an Eevee forever to maintain its cuteness. These different goals can create conflict and also show the individuality within the family. Also, their relationships with other Pokemon in the story can further define their characters. For example, an Eevee that is friends with a Pikachu might be more electric - friendly and have some Pikachu - like behaviors.
One possible fanfic could be where Ash discovers an abandoned Eevee. He decides to take it with him on his journey. Eevee quickly becomes a valuable member of his team, evolving into a Vaporeon to help him in water - based battles.
Some fanfics might have Eevee evolving into a form that combines two existing evolutions, like a mix of Jolteon and Flareon. This could be due to some strange scientific experiment in the fanfic's plot.
In many Pokemon fanfics, Eevee can evolve in unique ways compared to the official games. For example, it might evolve due to a special bond with a trainer rather than just using stones or leveling up at a specific location. Some fanfics might introduce new evolutionary triggers like a rare item found in a secret area or a once - in - a - lifetime event.
Friendship is a very common theme. Eevee and Vulpix are often depicted as having a strong bond, like in many fanfics where they support each other through difficult times. Another theme is adventure. They go on all sorts of quests together in different regions.
The different evolution paths of Eevee can be a really interesting element. For example, the trainer might be conflicted about which evolution to aim for, whether it's the speedy Jolteon, the tough Flareon, or the elegant Espeon. Each evolution could represent a different path for the trainer and Eevee's relationship and their future in battles and adventures.
In Pokemon female Eevee fanfics, a lot of them focus on the concept of family. The female Eevee could be part of a family of Eevees or have a surrogate family among other Pokemon or humans. Another common theme is the power within. It might explore how the female Eevee discovers and hones her unique abilities, whether it's a special move or a hidden power. And of course, the theme of survival in the wild Pokemon world also pops up quite often, where she has to fend for herself and overcome threats.
Ash's Eevee could learn some unique moves that are not common for Eevee. For example, it might learn a psychic - type move on its own, which could be a sign of its special potential. This could help Ash in battles against tough opponents like Team Rocket's more powerful Pokemon.