i'm asking this cos im training a new team for the battle tower.

i was thinking of leaving 1 pkm in the daycare while i train the other 2.

by leaving it in the daycare, i guess it will not gain any EVs?
so i can take it out at abt lvl 45, feed it with the desired vitamins, then train up the desired stats up?

can this be done? or will its stats still be weaker if i were to train it from lvl 5?