Do you have the Power Items or PKRS? They Help a lot.
Ill give to you if you want.
If not,
Go to Iron Island Mines
Battle for Defence EVs
Graveler (2) Onix (1) Steelix (2)
Go to Solacean Town
Battle the Cowgirl Below Town
5 Bidoofs = 5 HP EVs
or Battle Gastrodons = 2 EVs each
Go to Old Chateau
Battle Gastlies or if you have the Advance Games
Battle Gastlies = 1 Sp Atk EV, Haunters = 2 Sp Atk EVs, and Gengar = 3 Sp Atk EVs
Use 10 Calcium, 10 HP Ups, and 10 Iron
To take out 100 EVs in each
And Last,
Use the Counter App to keep track of EVs