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The implication from pAC is that checking eggs for legit-ness is not possible precisely because of that. The post from the_artic_one:
-implies that egg checking is now possible if given both parent PV/IV sets (or at least, that's how I'm reading it).
Corrections are always welcome.
I believe I misstated my reasoning. Let me try again:
1) I assume that the intent of the Shoddy programmers is to move Shoddy to more closely simulate the game mechanics. Having the PV/IV checker also check for egg PV/IV sets brings it closer to this goal.
2) I assume that detecting illegal...
Properly detecting illegal movesets would require implementing breeding mechanics, complete with exceptions from ADV, XD, etc. In that sense, incorporating such a detector implies simulating breeding.
It was my understanding that you have 4,294,967,296 different PVs, but for each PV, you have 3 possible IV sets. Given that, aren't there 3*(2^32) == 12,884,901,888 possible PV-IV sets?