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8 for the EV training + any you had before(i dont keep track of them :P)
Also you can keep copies of the pokemon you trained and you have semi-redis right son the azelf you won from my giveaway
the Magnezone is stuck on my HG right now - Ill transfer it to my Platinum when Ive finished EV training
Ive only got a bit of HP training to do so it should only take 30mins