If you know the IV's of your Pokémon, then you can also bring them to the Battle Subway to level them up/down to 50 then check (Note that instead of the stat bonuses that you gain from EV's at level 100 are halved at level 50, [like instead of 63 points from 252 EV's, you'd get 32 points from 252 EV's at level 50] since the stats are roughly halved)