Eevee

Eevee (イーブイ) is a highly popular Normal-type Pokémon in the Pokémon franchise, first appearing in the Generation I games, Pokémon Red and Green. It is known for its adorable appearance and unique evolution mechanic. Eevee possesses an unstable genetic code, which allows it to evolve into various Pokémon of different types through different methods, collectively known as "Eeveelutions". The initial three evolutions are the Water-type Vaporeon, the Electric-type Jolteon, and the Fire-type Flareon. Subsequently, the Psychic-type Espeon, Dark-type Umbreon, Grass-type Leafeon, Ice-type Glaceon, and Fairy-type Sylveon were introduced. Eevee plays a significant role in the games and has made frequent appearances in the anime and manga, making it an iconic character in the Pokémon franchise. In Pokémon: Let's Go, Eevee!, Eevee even appears as the protagonist's partner Pokémon.