Milotic

Milotic is a Water-type Pokémon from Hoenn region. It evolves from Feebas when fed 100 candies and has walked 20 km as the Buddy Pokémon.

Trivia

 * Along with Espeon and Umbreon, Milotic is one of the only Pokémon in the game that to evolve into them there is other additional requirement than Evolution Item. This requirement is Buddy distance.
 * They do not appear in the wild due to their evolution requirement, as there's Buddy distance required to be walked in order to evolve into them.
 * They do not appear in the wild due to their evolution requirement, as there's Buddy distance required to be walked in order to evolve into them.