Throughout Pokemon’s 20 year history, one of the most well known of them all is easily Eevee. Unlike pretty much every other Pokemon, Eevee has a lot of different evolutions that they can turn into, with the recent Pokemon Go offering three of them so far.
Eevee is likely one of the Pokemon you will find rather frequently in your journey in Pokemon Go, though not quite as prevalent as the likes of Pidgey and Rattata. Just like with every other Pokemon that can be evolved, there will be an Evolve option in the menu when you’re looking at Eevee, but is there a way to pick or know which evolution you’ll get?
The answer right now to that appears to be no. Reports started to surface right after release that there were ways to know where your Eevee would evolve into Flareon, Jolteon, or Vaporeon, but those has since proven to not be the case.
That had stated that it was based on which special attack move your Eevee had, which ended up being false. Another theory early on was that it would depend on which team you are on, since the three Eeveelutions share a color with the teams, but that is also not true.
As of right now, it appears that the evolution of Eevee is completely random in Pokemon Go. We know it’ll be one of the three, as the evolutions from the other generations are not included, but you’ll have to keep trying to get all three, as you may get multiple Jolteon in a row, or get lucky and get one of each in your first three attempts.