You could also put an Eevee in the Pokémon Day Care (on Route 34) with a Ditto and then hatch the eggs they produce together. A quick way to do this is to bike back and forth from the daycare into the city. This can be boring, so watch television or listen to music. The daycare man will call you whenever an egg appears, and then the eggs will hatch.
You can achieve this by battling with your Eevee on the team (without it fainting), keeping your Eevee on the team, giving it berries and protein, as well as giving it haircuts and taking it to the National Park. You can get a general idea of your Eevee’s happiness by talking to the woman in Goldenrod City. You can find her north of the Bike Shop and on the east side of town. [3] X Research source If she says, “It looks really happy! It must love you a lot,” your Eevee is ready to level and evolve. Only interact with your Eevee between 4:00 AM and 8:00 PM, as any time outside of that means your Eevee will evolve into an Umbreon.
After leveling in the daytime (4:00 AM - 8:00 PM), Eevee will evolve into Espeon.
You can achieve this by battling with your Eevee on the team (without it fainting), keeping your Eevee on the team, giving it berries and protein, as well as giving it haircuts and taking it to the National Park. You can get a general idea of your Eevee’s happiness by talking to the woman in Goldenrod City. You can find her north of the Bike Shop and on the east side of town. [4] X Research source If she says, “It looks really happy! It must love you a lot,” your Eevee is ready to level and evolve. Only interact with your Eevee between 8:00 PM and 4:00 AM, as any time outside of that means your Eevee will evolve into an Espeon.
After leveling in the night time(8:00 PM - 4:00 AM), Eevee will evolve into Umbreon.
Once your Eevee levels, it will evolve into a Leafeon.
