With the Eevees, you didn't get one with the five you needed because you statistically had a very small chance of that happening because you were missing 4 IVs. In order to have the best chances of getting a flawless spread of IVs, you NEED to have at least 11 out of the 12 IVs in the Day Care to be flawless.Before it was two eevee that, all together, had at least 8 perfect ivs and yet, never got one with the five I needed. For some odd reason.
Now I got a 6 perfect iv emboar holding everstone to transfer adamant breeding with a female pancham holding destiny knot and no perfect ivs.
The Destiny Knot works like this: You have 2 Pokemon in the Day Care. Each has an IV in each stat. Right now, you have one Pokemon with 6 flawless IVs and one Pokemon with 0 flawless IVs. The Destiny Knot will choose 5 stats out of the 6 (HP, Atk, Def, Sp Atk, SpDef, Spe) at random to take an IV from one of the parents to pass on to the offspring. Let's say it chooses HP, Atk, Def, Sp Atk, and Sp Def. Now, for each of those stats, ONE of the parents' IVs will be chosen at random to pass on to the offspring. Let's pretend it chooses Emboar/Emboar/Pancham/Emboar/Pancham. Now you have an offspring with 31/31/x/31/x, and the last IV, Speed, is calculated at random. It has a 1/32 chance of being 31. Statistically, it won't be 31. So now, your offspring Pancham is 31/31/x/31/x/x. It has 3 IVs.
If you had your 6IV Emboar and a 5 IV Pancham in the Day Care, who is 31/31/31/31/31/x for example, then that same example that I showed you would now be a 31/31/31/31/31/x offspring because those IVs that the Destiny Knot chose from Pancham are 31s now instead of Xs. When you have more 31 IVs in the Day Care, you are statistically more likely to pass those on to the offspring.
If you want to get a 31/31/31/x/31/31 Pancham from your current 6IV Emboar and 0 IV Pancham, you have a .5% chance of that happening. That means you will have to hatch 200 or more Eggs to get that Pancham. If you have a 6IV and 5IV Pancham in the Day Care, then you have an 8% chance of getting a 31/31/31/x/31/31 Pancham, which means you will only have to hatch around 15 eggs to get the spread you want.
Basically, you have to switch in offspring female Pancham with more IVs than the parent, one by one, until you have a 5IV Pancham and a 6IV Emboar in the Day Care together.