Pixelmon Mod

I'm a bit rusty on my pokemon gameplay. Anyone know the exacts (or even close estimations) of what changes the friendship? I remember leveling makes it go up some and fainting it goes down a bit. Anyone know what else in Pixelmon can affect it?

Let it walk around ( out of its pokeball of course ) That raises the happiness of my pokemon too .

Sometimes don't work.

With eevee i going with him 5 hour! Friendship - OK -.-