Well, you battle with it, travel with it, and a nice trick is to use items on it. But if your trying to get a Espeon/Umbreon, you can't get it in Pokemon FR/LG, because there isn't time in FR/LG. You have to trade it to Pokemon R/S/E, evolve it there, then trade it back. EDIT by tehpengywin: The following ways will increase/decrease your Pokemon's Happiness value (Taken from Bulbapedia):
Gaining a level (+2)
Walking 256 steps (+1)
Vitamins (+2)
Pokemon FireRed/LeafGreen: Grooming (in Pallet Town, by Daisy) (+3)
Luxury Ball causes the following:
- Gaining a level is now +6
- Vitamins are now +6
- Walking is now +2
- Grooming is now +4
Using Soothe Bell (+1 for each other positive event)
Energypowder (-5)
Heal powder (-5)
Energy root (-10)
Revival Herb (-15)
Faint (-1)
Eevee does not evolve on a specific level. Rather, it evolves when exposed to the right kind of elemental stone (Thunder Stone, Water Stone or Fire Stone), or if it is especially happy with you when you level it up.
Unfortunately, Eevee cannot evolve into either Espeon or Umbreon in Pokemon FireRed as the game lacks an internal clock. Trade the Eevee to Ruby, Sapphire or Emerald and level it up with high happiness during the day or night to evolve it into one of the two Pokemon.
Read more: On_which_level_does_Eevee_evolve_in_Pokemon_Fire_Red
Max out Eevee's happiness during the day. ~KKMG1
You evolve an Eevee into and Espeon by raising it to max happiness. Pokemon gain happiness when you give them massages (in Goldenrod underground and Blue's sister.) It will take a while to reach max happiness. Then you level it up in the day. It will evolve into Espeon.
Max out Eevee's happiness, then level it up during the daytime.
You can't. You need to send it to a game pertaining to the Hoenn region and for umbreon max out the happiness of your eevee and level up from 12pm to 12am. Eevee usually attains max happiness at lvl 40.....at least for me
you cant you must evolve an eeve at night with max friendship.
Max out Eevee's happiness during the day. ~KKMG1
Max out it's happiness.
To evolve Eevee into Espeon in Pokemon Emerald you need to raise it's happiness to max and level it up during daytime. To raise happiness you can keep the Eevee in your team for a while and fully healed up it should eventually reach max happiness to evolve in the daytime.
You evolve an Eevee into and Espeon by raising it to max happiness. Pokemon gain happiness when you give them massages (in Goldenrod underground and Blue's sister.) It will take a while to reach max happiness. Then you level it up in the day. It will evolve into Espeon.
Max out Eevee's happiness, then level it up during the daytime.
I believe that you have to get the eevee to max happiness ( or really high ) and level it up in the nighttime.
evolve eevee into an umbreon by getting max happiness!
you can't, you have to max out eevee's happiness at night to evolve it into Umbreon.
You can't. You need to send it to a game pertaining to the Hoenn region and for umbreon max out the happiness of your eevee and level up from 12pm to 12am. Eevee usually attains max happiness at lvl 40.....at least for me
to get one you raise eevee to max happiness during the DAY.
Any level, just get it to max happiness.
To get umbreon on Pokemon heartgold, you must max out an Eeevee's happiness at night. (8:00pm to 11:59pm) Some ways to do this are battling with it but DO NOT LET IT FAINT! Walk with it, and give it a soothe bell. That boosts happiness as well. To get a basic idea of how happy it is, take it to the house near the bike shop in Goldenrod City. Talk to the lady in the house and she will give you an estimate.Level up an Eevee at max happiness during the nighttime.you have to walk very very much and you have to train it lvl 25 or higher at night.You don't have to level it up beyond any specific level. Eevee will evolve below level 25 as long as it has enough friendship.first max out the happiness of the Eevee you get from bill by walking with it a lot. Then, at nighttime, train it to somewhere around lvl. 25.Eevee can evolve at any level, even below lvl 25, as long as it has enough friendship.