Piplup

Piplup is a Water-type Pokémon from the Sinnoh region. It evolves into Prinplup when fed 25 candies and its final evolution is Empoleon.

Event Pokémon forms
These Event Piplup forms cannot evolve.

Trivia

 * In Generation IV of core series games, Piplup was a Starter Pokémon and now, in Pokémon GO, though it is not official, it is considered a Sinnoh-region Starter Pokémon in players community.