For future reference, you might want to write down the stats of the hatched Pokémon to save time when RNGing next time.Write down which IVs have been inherited and from which parent.Go to your hatched Pokémon’s Summary and calculate its IVs.Don’t worry, you don’t have to save your game. Go to the Battle Institute (Lumiose city, Northern Boulevard) and take a test.Ride your bike outside the Day-Care until Day-Care Man gets an Egg for you (he’ll be facing down, towards the road).Put your Test Parents in the Day-Care.There’s a 60% chance that the offspring will inherit mother’s Ability. Make sure that the female (or Male if breeding with Ditto) has the desired Ability. A bunch of Pokémon you want to RNG with at least 2/3 perfect IVs.A Pokémon with either Flame Body or Magma Armor ability and a Pokémon that can use HM02 Fly (Fletchinder and Talonflame are your best bets as they both and Fly and have Flame Body).Destiny Knot (2nd floor, Cyllage City Hotel) and Everstone (Geosenge Town, given by a Scientist in leftmost house).Personally, it happened to me only when I’ve been breeding genderless Pokémon, but there were reports of the shakiness for other Pokémon as well. It’s recommened to use Test Parents with the same gender ratio as the target. Important: Inheritance can differ for Pokémon with different gender ratio. Note that if you don’t have any 31 IVs among your Test Parents, you have a higher chance of spotting a hex flawless spread as the stat that’s not inherited is random. If you don’t know the exact EV spreads of your pair, just erase them with a Reset Bag.
The best way to find them out is to go to the Battle Institute (Lumiose City, Northern Boulevard) as their level will be set to 50 and the results will be very accurate. A pair of Test Parents from any egg group that both have all different IVs.In order to be 100% sure about what IVs and from which parent are inherited by the egg, you need to have following things: Sounds pretty crazy, but believe me, it works! Prerequisites Yes, it’s actually happening! The credit for it goes to Japanese players who discovered that IVs of the egg are determined before the parents are even deposited in the Day-Care. By Gonzo 136 Pseudo RNG Abuse for Eggs in Pokémon X & Y