Happiness

Happiness is a number between 0 and 255 that gauges how friendly a Pokémon is towards its trainer.

Every Pokémon starts with a base happiness, which will change based on certain events:

• Keeping the Pokémon outside of its Poké Ball will cause it to gain happiness every 40 seconds.
• Leveling up the Pokémon will raise happiness.
• Letting the Pokémon faint will lower happiness.
• Using a Pomeg Berry, Kelpsy Berry, Qualot Berry, Hondew Berry, Grepa Berry, or Tamato Berry on a Pokémon will raise happiness.
• Using an HP Up, Protein, Iron, Calcium, Zinc, or Carbos on a Pokémon will raise happiness.
• Trading the Pokémon will reset its happiness to 70.
• Capturing a Pokémon in a Friend Ball will set its initial happiness to 200 rather than 0.
• Capturing a Pokémon in a Luxury Ball will increase the happiness gained by leveling up.
• Letting the Pokémon hold a Soothe Bell will cause events that raise happiness to increase happiness by a larger amount.

Happiness increases/decreases

The amount of happiness gained/lost by the above events changes based on the amount of happiness the Pokémon currently has. All happiness gains are increased by 50% (rounded down) with a Soothe Bell

Method	0-99	100-199	200-255
Outside of Poké Ball	2	2	1
Level up	5	3	2
Fainting	-1	-1	-1
EV-reducing Berries	10	5	2
Vitamins	5	3	2

Evolution

A happiness of 220 or more upon leveling up is necessary to evolve:

• Azurill→Marill
• Budew→Roselia (Day)
• Buneary→Lopunny
• Chansey→Blissey
• Chingling→Chimecho (Night)
• Cleffa→Clefairy
• Eevee→Espeon (Day)
• Eevee→Umbreon (Night)
• Eevee→Sylveon (knows Fairy-type move, in Sunflower Plains or Flower Forest biome)
• Golbat→Crobat
• Igglybuff→Jigglypuff
• Meowth (Alolan)→Persian (Alolan)
• Munchlax→Snorlax
• Pichu→Pikachu
• Riolu→Lucario (Day)
• Snom→Frosmoth (Night)
• Swadloon→Leavanny
• Togepi→Togetic
• Type: Null→Silvally
• Woobat→Swoobat