of course you can unless the level of the Pokemon is to low to reach 252. just EV train until it wont allow you to give your Pokemon anymore.
Train Aron.
you have to train your girl kirlia
Train it to Level 30
Train it to level 45.
e1337 4
There are various good places to train flying types in Pokemon Platinum. A good thing to do would be to use the vs seeker.
victory road
Some people will argue with me but i think the best place to train is at the Pokemon lugue you can battle them over and over again
Let your Pokémon hold Soothe Bell and train OR feed it Berries that lower its stats but makes it friendly- DON'T overdo it.
Train your magneton at Mt. Cornet
You have to train an Eevee by happiness at night
anywhere.