>>14916970Learn type matchups.
Learn how to effectively EV train (basically just train a Pokemon's two strongest stats; sometimes three).
Learn how to recognize good base stats and movesets (anything below 75 is bad, anything above 100 is good).
Learn a few key Pokemon's defensive layout (for example, you would try to avoid using Flamethrower on a Regice because it has super high Sp.Def in the first place).
etc.
Plus EV training is easier than ever before thanks to Gen 6.