Enter a wifi battle with your friend and put your desired hatchling in your party. In the team selection page, check the stats of the pokemon you want its IVs checked. This will give you an accurate reading as its level will be bumped up to 50.
3DS Friend Code: 2509 - 1971 - 8732 Do add me, especially if you're playing Pokemon X & Y. Private message me when you have and I'll add you back. Cheers!