Of all the Pokémon in the Pokéworld, Eevee remains something of a rarity. The evolutionary wildcard has always featured random evolutions, and now that Gen 2 has hit Pokémon GO, the potential forms have increased from three to five. People have long speculated that there would be a similar naming trick after the update to control which of the five Eevees you’ll get after an evolution, and it turns out that speculation was right. So, here they are: if you want your Eevee to turn into Umbreon, name it “Tamao.” To turn your Eevee into Espeon, name it “Sakura.”
Like with the original names, these are taken directly from the Pokémon anime, which crops up in little Pokémon GO Easter Eggs from time to time. There are more Eevee evolutions in more Pokémon generations to come, so we assume that there will be a similar trick to those as well.
To recap, there are now five potential evolutions for the little Eevee you’ve picked up. For Flareon, name it “Pyro.” For Vaporeon, name it “Rainer.” For Jolteon, name it “Sparky.” For Espeon, name it “Sakura.” For Umbreon, name it “Tamao.”
It should be noted that each of these naming tricks would only work once for each form, so don’t imagine you can use it to build up an army of slick Espeons. That’s the way it worked for the previous evolutions, and there’s no reason to assume that it has changed.
And that’s it. Collecting all the Pokémon in the game still involves a fair bit of luck, but at least you can eliminate the element of chance in this particular instance. Happy hunting.