When you evolve Eevee, you have a 1:3 chance of evolving it into either a Jolteon, Flareon, or a Vaporeon. However, it’s possible to use a trick that evolves it into the evolution of your choosing. Simply rename the Eevee one of the names below to receive the corresponding evolution.
- Sparky: Jolteon
- Pyro: Flareon
- Rainer: Vaporeon
This trick is a reference to the Eevee brothers from episode 40 of the Pokemon animated series.
Originally Posted by: gamespot.com