I can attest to this one! I use a prankster male meowstick, holding a light clay, with misty terrain, reflect, light screen and charm.
Quite useful against physical attackers And it helps me switch another mon and set up for (almost) free.
I'm so sorry, I'm only seeing your reply now.
I have a ton of dragon scales, if you need them.
Do you still need those pkmns? If not, can you tell me which ones you are looking for?
It is, since the higher the stats, the clearer will be the variations caused by the IVs.
There's another way, but it isn't as reliable imo. Its the Iv checker guy. you can find him in the battle subway after you beat the E4.
Here is a guide for him:
http://pkmn.net/?action=content&page=viewpage&id=8921&parentsection=308