Ever thought it'd be cool to have your art, writing, or challenge runs featured on PokéCommunity? Click here for info - we'd love to spotlight your work!
Welcome to PokéCommunity! Register now and join one of the best fan communities on the 'net to talk Pokémon and more! We are not affiliated with The Pokémon Company or Nintendo.
Yes, it still has to do with day and night. However, you do have to trade your Eevee to Ruby/Saphire/Emerald to get it to evolve into Espeon or Umbreon.
Next time you have a question, ask it in Simple Questions. Using this thread helps us reduce spam so it helps us help you. The link to this super-thread is in my sig and in the group of stickies near the top of the FR/LG (GBA) thread listing.