So I have decided to start EV training my Growlithe with max Sp. attack & attack. He is holding the macho brace. His nature is calm. I have EV trained for 2 sessions now. I have decided to start with attack first. One time I got 24 EV's in total & when Growlithe leveled up to level 31 it only added +2 (or +3) I have just beaten Morty so I have not completed the game. I have also wasted some EV's, but I will use Berries to get rid of those later, I would like to know where to find them, though. I though I did everything right! The Pokemon I killed for EV's where Stantlers & Growlithe which give off 1 attack EV, but two with the macho-brace. Have I done something wrong? Sorry if this is just kind-of a list of info!
At lower levels, EVs don't show as much. When you grow to higher levels, you will see more added in.