• I did this in my Emerald before, but this is different in 4th gen.
What time will I need to gain happiness to my Eevee for it to evolve into Espeon / Umbreon?
Will they be the same times as Gym leaders that you are able to fight during the morning and night time?
Eevee to Espeon - 4am to 8pm
Eevee to Umbreon - 8pm to 4am
You have to train evee and make it happy durring the day (4am-8pm) and sonner or later it evolves into an espeon. you have to go through the same process for umbreon but you have to train durring the night (8pm-4am).