I am a relatively smart person, but when reading up on EV training for a small refresher, some forums basically said that Pokemon obtain EVs even when not holding Macho Brace. I previously beleived to obtain EVs, a Pokemon must hold a Macho Brace or Power Items (Brace, anklet, etc.)
So, I ask, is this true?
Also, if I simply want to level up my Pokemon to level 50, it will gain EVs?
I know most of the other EV training mechanics (Power Items, Pokerus, EV reducing berries), if that helps your answering.