Happiness also referred to by fans as friendship, is a measurement of how much a Pokémon is attached to its Trainer and enjoys being in their care. It affects the evolution of certain Pokémon, the power of Return and Frustration. Certain events increase a Pokémon's friendship (gaining a level, walking a certain amount of steps) or decrease it (fainting). The Pokemon must be following the trainer to gain happiness. Biking does not increase happiness.Holding Soothe Bell makes the Pokemon gain +1 happiness at every gain.
|Happiness :||0 to 99||100 to 199||200 to 255|
|Walking 256 steps||+1|
|Using EV-lowering Berries||+10||+5||+2|
|Fainting a pokemon (only at LVL 100)||+1|
|Trading||Reset to 70|
Berries' happiness gain only applies when you get another point of happiness.