um theres are some possibilitys. first make sure there really close to you (your eevees)
then once you think you have a very strong bond, level up in a battle at night for umbreon or day for espeon.
use sun stone for espeon then moon stone for umbreon\
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You can evolve Eevee to Espeon or Umbreon by giving it 'friendship' which means using it alot in battle, and not letting it die ect. You get Espeon in Day and Umbreon at Nite with the friendship. espeon 4:00 AM- 7:59PM and umbreon-8:00PM -3:59AM
you cant you must evolve an eeve at night with max friendship.
depends on happiness espeon during the day umbreon at night
yes you have to use a dark type stone! Don't listen to him^^^ he surely doesn't know his Pokemon if he thinks you can evolve eevee to umbreon with a stone. You got to train eevee at night only.Then when you are close friends with it, it'll evolve
K.....1-they do not evolve by stones 2-you get an espeon or umbeon buy it evolving during day or night to check that go to your clock at your house if it's anywhere between 9:00-12:00 pm it will evolve into umbreon anywhere from 9:00am-4:00pm it will evolve into espeon