Friendship

What friendship is stored, what raises it, and what still reads the species' base value.

Every Pokémon has a friendship value from 0 to 255. It starts at its species' base friendship (70 for most species).

What raises it

Only two things change friendship:

	Friendship below 100	100 to 199	200 and above
A vitamin (HP Up, Protein, Iron, Calcium, Zinc, Carbos)	+5	+3	+2
An EV-lowering berry (Pomeg, Kelpsy, Qualot, Hondew, Grepa, Tamato)	+10	+5	+2

A held Soothe Bell makes each gain ×1.5. See EV training for what the items do to EVs.

Differs from the mainline games

Friendship is stored, but most of the game does not read it yet:

Walking, levelling up, battling, fainting and the Luxury Ball do not change it.
Return and Frustration use the species' base friendship, not the Pokémon's own value, so a Pokémon's Return is always as strong as its species' base allows.
The friendship checker also reports the species' base friendship.
Friendship evolutions do not happen yet.