Gameplay of Pokémon
Another way Pokémon evolve is through happiness. Whenever the player character in the game walks 100 steps, gives their Pokémon a vitamin such as Protein, Iron, Carbos, Calcium, or Zinc, training it until it gains a level, or when the character does something else to make it happy, it will gain happiness points. The item Soothe Bell multiplies this amount. Once a Pokémon has reached a certain happiness level, it will evolve after it is leveled once, sometimes depending on the time of day: