What are all the ways to increase Friendship in Pokemon X/Y

pokemon-x-y

I'm looking for all the ways to increase Friendship in Pokemon X and Y. Note that Friendship is different from Pokemon Amie Affection; they both do different things.

Best Answer

Boosts Happiness

  • Walking 128 steps
  • Getting a massage (Cyllage City)
  • Using vitamins
  • Levelling up
  • Using EV berries
  • Soothe Bell (Shalour City)

Reduces happiness

  • Fainting
  • Using bitter medicine

Trading resets a Pokémon to its base happiness

Here is the happiness page from Bulbapedia. It has not yet been updated for XY, but the boosts from Gen V have not altered.