Question: how to evolve eevee into umbreon pokemon gaia?
Answer: Welcome to Gaia! :: 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.