A pokemon create via pkhex or powersaves can't be legal for definition (a pokemon even with normal moves,ivs, nature and ability created via these methods can be assumed as legit but not legal). Btw pokemons created with pkhex, if used correctly without hacked (with pkhex you can edit literally anything of the pkm), are indistinguishables from legals U_U . Personally I find this one just a faster way to create your personal team, but the satisfaction to make it with the ordinary method can't be compared (if i'm not forced by events, I always breed my pokes). 
" Sometimes you must HURT in order to KNOW, FALL in order to GROW, LOSE in order to GAIN because life's greatest lessons are learned through PAIN."
-Pain
