Can Eevee Evolve in Let's Go Eevee?

Is it possible to evolve your starter Pokémon in the Let's Go games? ... Yep, that's right, just like in Pokémon Yellow, you can't evolve your chosen critter at all. Normally, Pikachu evolves into Raichu, and Eevee can be evolved into Flareon, Jolteon, or Vaporeon, depending on which elemental evolution stone you use.

Can you evolve starter Eevee in let's go Eevee?

Can I evolve my starter Eevee in Pokémon Let's Go? Nope. Sorry. Just like Pikachu, the Eevee you first catch at the start of the game is a stubborn little mon and does not want to evolve.

Can you evolve Eevee into Umbreon in Pokemon Let's go Eevee?

Once you've walked 10km with that Eevee as your buddy Pokemon, it's ready to evolve into either Epseon or Umbreon. Just evolve in the day for Espeon and night for Umbreon - and this isn't limited, you can do it as often as you like!