Is there only one Eevee in fire red?

What Are The Different Eevee Evolutions? Vaporeon, Flareon, And Jolteon Aren't The Only Ones

Eeveelution - Bulbapedia, the community-driven Pokémon encyclopedia

Celadon City - Pokemon Fire Red and Leaf Green Guide - IGN

[3] Fire Red gift Eevee! I love the way the sprite looks :) : r/ShinyPokemon

Pokémon GO Community Day: How To Get Yourself Every Shiny Eevee Evolution

Pokemon Eevee 48/68 Holo Rare Hidden Fates NM/MT

Evolve Eevee into Epseon, Umbreon, Jolteon, Flareon or Vaporeon

The 10 Best Pokémon In Fire Red & Leaf Green: Hands Down - Cheat Code Central

Pokémon Scarlet and Violet: how to capture an Eevee and get all of its evolutions - Meristation

Eevee, Pokémon Wiki