So I read that there's a trick that you rename your Eevee to Rainer or so, but it's not working for me. What are the possibilities of the things I'm doing wrong? My Eevee has CP 188, it's name is Rainer, I restarted the app, and that's the only eevee I have. Do I still have to have 25 candies to evolve it?
Yes, you still need to feed your Eevee candies to evolve it. The trick you're referring to is a popular trick to control which Pokémon Eevee will evolve into.
Unlike most other Pokémon, Eevee can evolve into several distinct Pokémons. In Generation 1 (which is what Pokémon Go uses), they are:
In the traditional games, you need to give Eevee an evolution stone to make it evolve. A Water Stone for Vaporeon, a Thunder Stone for Jolteon, and a Fire Stone for Flareon. Since these stones don't exist in Pokémon Go, Eevee evolves randomly into either.
To avoid having to rely on luck, people have attempted to determine what Eevee will evolve into. Eventually, it was discovered that renaming Eevee allows players to define which Pokémon Eevee will evolve into:
- Rainer -> Vaporeon
- Sparky -> Jolteon
- Pyro -> Flareon
Restarting the game is only used to ensure that your Eevee has been renamed, since the servers aren't always available. By restarting, you can determine if your Eevee has been successfully renamed before you spend candies to evolve it.
Of course, this doesn't change the fact that you still need to candies to evolve your Pokémon. Also keep in mind that the trick only works if you haven't registered the respective evolution in your Pokédex yet.
in the pokedex it says the the environment in which the eevee lives will affect the way it evolves, but changing where you evolve your eevee will not make a difference. After the update many of my friends and I have been getting almost exclusively Jolteons. Maybe because we have a lot of vaporeons. Renaming your Pokemon Rainer over and over again used to result in a lot of vaporeons, but now it only works once. Jolteons are more common because when you evolve them the cp multiplier is lower, so you can evolve 3 CP 650+ eevees and have three 1300 jolteons :( whole if you'd gotten vaporeons the CPs would have been higher.