here is my solution; if ur after kick ass leveled pokemon or items, if u hav Pokemon Emerald, use the cloning cheat at the battle tower to duplicate a pokemon holding a rare candy. you can do this while ur on ur pc doing watever u do on ur computor. Then just use the rare candy on the pokemon and if u want good stats duplicate a pokemon holding items such as proteins, carbons etc
Another thing is to remember to ask ur friend how he hacked. if he hacked using a devise, go over his house and steal it for a while, if he doesnt say well then just do the old fashion way of searching the FAQs for the E.V guide and go to the location where the pokemon are to train that E.V - or go train at the E4 and the when ur about to level train at the wanted E.V place.
If you do hav a pokemon Emerald, Fire Red, Ruby or Sapphire, trade the pokemon u want to train over to that game. You'll get leveled faster because of the boost and also the stats will be effectivly higher for some reason.
I kno this was a lot of reading u hav to do if u can be bothered reading it but hopefully it helps