>>14954430People have been using Friend Safari pokemon which are guaranteed to have at least 2 IVs at 31.
The NPC in Kiloude's Pokemon Center will gauge them. He'll list which 2+ stats are perfect.
What he does is list the highest stat(s) and say if if they're good or great. If they're perfect then he'll say that they can't be beaten.
Pokemon holding a power item will pass down the related stat's IV 100% of the time too.