This appears to be decided at random in the game, but players have figured out a way to force a particular evolution using a hidden in-game Easter egg. Here's how you can make your Eevee evolve ...
The Pokemon Company has announced the Year of Eevee, which will see a bunch of new merchandise surrounding the Pokemon and its evolutions.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback