Two questions: a) How important is IV breeding and b) What's the best way to go about it.
Simply I just trained up my first EV trained pokemon: a Porygon-Z. I used my evolution items and a couple unique TMs and was feeling pretty good about the pokemon. But then I stumbled across an IV calculator (I think Serebiis) and if I calculated it correctly it came out with some pretty horrible IVs (0 in speed!). So basically is it worth IV training my pokemon (it looks very complicated and time-consuming), do I not stand a chance in competitive play without great IVs?
Simply I just trained up my first EV trained pokemon: a Porygon-Z. I used my evolution items and a couple unique TMs and was feeling pretty good about the pokemon. But then I stumbled across an IV calculator (I think Serebiis) and if I calculated it correctly it came out with some pretty horrible IVs (0 in speed!). So basically is it worth IV training my pokemon (it looks very complicated and time-consuming), do I not stand a chance in competitive play without great IVs?

