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.
Well, I've heard of a fanfic named 'Eevee's Encounter with Vulpix'. In this story, Eevee gets lost in a forest and is found by Vulpix. They then start an adventure to find Eevee's way back home. There's also a fanfic where they team up to help a group of baby pokemon that are in danger. It shows their courage and kindness.
One possible fanfiction could be about Eevee and Vulpix teaming up on an adventure. They might start in a forest where they encounter a group of Pidgey that are causing trouble for the other small Pokémon. Eevee, with its adaptable nature, could use different moves to try and scare the Pidgey away, while Vulpix uses its fire - based attacks to create a barrier. As they work together, they start to understand each other's strengths and weaknesses better, forging a strong friendship along the way.
One common theme is friendship. Since Vulpix and Eevee are both cute and popular Pokemon, many fanfictions focus on their bond. They often go on adventures together, relying on each other.
Maybe in the fanfiction, Eevee and Vulpix are both lost in a mysterious forest. They start to look for a way out together. Along the way, they come across ancient Pokémon ruins. Inside the ruins, there are puzzles and traps. Eevee, being a very adaptable Pokémon, uses its different forms' abilities (even if it doesn't actually change forms yet in the story) to solve some of the puzzles. Vulpix uses its fire to light the way and keep away any dangerous Pokémon that might lurk in the dark corners of the ruins. As they progress, they become closer friends and finally find their way out of the forest.
A really interesting fanfiction is the one where Vulpix and Eevee get lost in a strange part of the Pokemon world. They encounter new Pokemon species they've never seen before. As they try to find their way back home, they learn more about each other and their own capabilities. It's full of adventure and discovery.
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.
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.
No, they can't. Pokémon breeding has specific rules in the Pokémon universe. These rules are designed to keep the species somewhat distinct in terms of how they reproduce. Eevee is in the Field and Fairy Egg Groups, while Vulpix is in the Field Egg Group, but just being in the same Egg Group doesn't mean all Pokémon can breed. There are other factors and restrictions that prevent a male Eevee and a female Vulpix from mating.
One popular theme is the journey they go on together. Maybe they're on a quest to find a special place or item, and their love grows during the adventure.