Thanks. Don't worry too much about what I asked, I feel like I'm taking you around twists and turns the way I'm asking things. So in the end, for any perfectionist, the perfect setup for performing this pseudo-RNG is to have, from my take, a collection of three pairs of parents, each with the right IV spreads and a pair or each ability. The way I'm doing things so far is that I'm accounting for the Ditto being male and that my non-Ditto test parents will always be female. Of course, this'll only work on a handful of species, but I'm doing it primarily because I want to pass down the PokeBall type (it's like a novelty thing):
Male X/31/X/31/X/31 Ditto [Atk, SpAtk, Spe]
Female 31/X/31/X/31/X Gyarados [HP, Def, SpDef] 50:50 (Moxie)
Female 31/X/31/X/31/X Togetic [HP, Def, SpDef] 87.5:12.5 (Serene Grace)
and I recently just caught a female 31/X/31/X/31/X Super Luck Togepi after assessing this thread in the past hour. Assuming what we discussed is concrete, that means I would have to find at least another female Togepi with the identical female IV spread but with Hustle, a female Gyarados with the female IV spread but with Intimidate, and another female Pokemon with the female IV spread but with an ability in slot 2/B. I'm really just making this more difficult than it should be...
EDIT: My bad if this isn't the place for this sort of thing, but if anyone here happens to have a foreign Ditto with spread that I'm using for the one I mentioned above, that would save me a lot of time in generating eggs.