 When Pokémon like Chansey or Golbat level up and have very high Friendship, they will evolve.In addition to its use in certain evolutions, the moves Return and Frustration base their power on the Pokémon's friendship value, with Return's power rising the higher the friendship value is and Frustration's power rising the lower the friendship level is.In "Pokémon X" and "Y", a feature known as was introduced; in "Sun", "Moon", "Ultra Sun", and "Ultra Moon", the feature is known as Pokémon Refresh.