Nintendo wants to make sure you fully enjoy the upcoming game, Pokémon: Let’s Go by releasing this yellowish bundle above. There are two bundles for fans to enjoy, one each for the Pikachu and Eevee versions of the game. Each comes with a download code, a brown and yellow Joy-Con, decal decorated Switch dock, and […] Source
So playing in night with eevee version theres a chance of turning the color to dark.
But I think if eevee evolved to jolteon there be no difference from pikachu.
