Eevee

Eevee is a Normal-type Pokémon from Kanto region. It can evolve into 5 different Pokémon when fed with 25 candies, these Pokémon are: Vaporeon, Jolteon, Flareon, Espeon and Umbreon.

Trivia

 * There is an Easter egg that referes to the names of the Eevee Brothers. Naming Eevee to "Rainer", "Sparky" or "Pyro", results evolving in a Vaporeon, a Jolteon or a Flareon respectively.
 * Works only once per account and even Eevee was already evolved into any of these Pokémon not using this method
 * With the release of Pokémon from Johto region, Eevee can evolve into either an Espeon or an Umbreon. The "naming trick" Easter egg, as noted above, can be used to obtain the evolutions listed below.
 * Espeon can be acquired by naming Eevee "Sakura" or walking an Eevee as a Buddy 10 km or more, and evolving it during the day.
 * Umbreon can be acquired by naming Eevee "Tamao" or walking an Eevee as a Buddy 10 km or more, and evolving it during the night.
 * Same as with Eevee's Kanto-region evolutions, name-method works only once per account, even if Eevee was already evolved into any of these Pokémon prior to using this method.
 * There is an Easter egg that referes to the names of the Eevee Brothers. Naming Eevee to "Rainer", "Sparky" or "Pyro", results evolving in a Vaporeon, a Jolteon or a Flareon respectively.
 * Works only once per account and even Eevee was already evolved into any of these Pokémon not using this method
 * With the release of Pokémon from Johto region, Eevee can evolve into either an Espeon or an Umbreon. The "naming trick" Easter egg, as noted above, can be used to obtain the evolutions listed below.
 * Espeon can be acquired by naming Eevee "Sakura" or walking an Eevee as a Buddy 10 km or more, and evolving it during the day.
 * Umbreon can be acquired by naming Eevee "Tamao" or walking an Eevee as a Buddy 10 km or more, and evolving it during the night.
 * Same as with Eevee's Kanto-region evolutions, name-method works only once per account, even if Eevee was already evolved into any of these Pokémon prior to using this method.