how does an eevee evolve into a umbreon?
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Walk your Eevee as a Buddy for 10km, then evolve it either during the night (Umbreon) or day (Espeon) and it'll turn into the desired evolution. ... Since the naming trick only works once per evolution type, this appears to be a useful way to get a second Espeon or Umbreon with some reliability.
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After having a full friendship meter and leveling during the day, 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.
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Walk with your Eevee Buddy for at least 10 KM and until you get two at least Eevee candy. (You need to have gotten two candy for this to work.) While that Eevee is still your Buddy, hit the Evolve button during the day (game screen in bright) to get Espeon, or at night (game screen is dark) to get Umbreon.
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Junior Trainer You need to level eevee up at night time with full happiness then it evolves to umbreon.
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First of all, to evolve Eevee into Umbreon in X/Y, you'll have to gain full friendship. After that, you'll have to level up DURING 8PM and 4AM. It should evolve. If you accidentally evolve Eevee into Espeon, then you must've leveled it up during 4AM to 8PM, so make sure you check the time.
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Evolving it into Espeon is very much like Umbreon, except this time you'll need to evolve it during the day time rather than at night. The rules are almost the same: get its friendship up by playing with it and feeding it at your Camp, and then level it up during the day to force it to change its form.
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Umbreon and Espeon both evolve after walking with the Eevee as your buddy Pokémon for 10 kilometers. Once that's done, the buddy Eevee evolved during the night will yield Umbreon while the day will yield Espeon. Note that when you evolve Eevee, it still needs to be your buddy Pokémon for this trick to work.
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Pokemon Ultra Sun and Moon Eevee Evolution into Espeon Its soft fur acts as a channel to its psychic abilities. To achieve this evolved form, you must maximize friendship with your Eevee and then level it up during the daytime.
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Umbreon (Dark): You can evolve Eevee into Umbreon by using a Friendship Ribbon which can be obtained by any PokeShop NPCs, in the Evolution Items section. Use the Friendship Ribbon only in the Nighttime. The Friendship Ribbon can be purchased for $20,000.
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Umbreon can be obtained by evolving Eevee using a Friendship Ribbon at night. Umbreon can also be obtained through trade or Pokémon Roulette.
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So far, Pokémon Go has added Eevee evolutions for the first four Generations of creatures, which means Eevee can only evolve into Leafeon, Glaceon, Umbreon, Espeon, Flareon, Jolteon and Vaporeon for now.
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In order to get Eevee to evolve into either Espeon or Umbreon, you'll need to raise its Friendship level to at least 220. A common way to increase Friendship is to just keep Eevee in your party as you walk around. You'll gain 1 Friendship every 512 steps you take in the game.
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To evolve your Eevee to a Vaporeon, use the same steps, but name it Rainer instead of Pyro and to evolve your it to a Jolteon, name it Sparky. With the gen-two update, Eevee got two new evolutions. To get a Espeon, rename it Sakura before you evolve your Eevee or rename it Tamao to get an Umbreon.
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The gist of it is that you need to get two TM items that Eevee can learn and repeatedly teach it the same moves over and over again, as it becomes happier each time it learns one. After that, make it gain a level during daytime, and it should evolve into Espeon.
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In order to evolve your Eevee into Umbreon, you first need to raise it's Happiness, then evolve it at night. There are also berries that will increase your Poke's happiness at the expense of EV's; they're best used when the Poke first hatched so it doesn't have any EV's to lose.
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Since there is no day and night, you might be puzzled by how you can evolve your Eevee in R/S/E, but even though there are no visible day and night, Eevee will evolve into Espeon from noon to midnight, and into Umbreon from midnight to noon.
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Thus, the process of evolving an Eevee into Espeon or Umbreon usually involves trying to raise its happiness above 220 and then simply leveling it up at the right time. It does not matter when you raise Eevee's happiness; only the time of that final level-up matters.