Eevee

Eevee is a Normal-Type Pokemon from Geneation I. It so far has 8 evolutions.

Eeveelutions
Eeveelutions are the evolved forms of Eevee. The Eeveelutions so far are Vaporeon, Jolteon, Flareon, Espeon, Umbreon, Glaceon, Leafeon, and Sylveon.

Vaporeon
Give your Eevee a Water Stone

Jolteon
Give your Eevee a Thunderstone

Flareon
Give your Eevee a Fire Stone

Espeon
Level up your Eevee with high friendship during the day

Umbreon
Level up your Eevee with high friendship during the night

Glaceon
Level up your Eevee on Route 217 or Twist Mountain

Leafeon
Level up your Eevee in Eterna Forest or Pinwheel Forest

Sylveon
no information avalible