Gen 3 Breeding PID Legality

[StarfBerry]

Recently I rng'd a Kingdra from the Battle Pyramid and I caught it in a Poké Ball using the Pomeg Glitch.
When I read my Emerald save file with PKHeX, the Kingdra is considered as illegal and that makes sense.
But when I transfer it into Gen 4 he's still considered as illegal cause of "PID mismatch".
So I checked if the PID and IVs of my Kindgra were possible via breeding in Emerald and yes it can.
Emerald Breeding RNG Process : https://github.com/Admiral-Fish/PokeFinder/blob/master/Core/Gen3/Generators/EggGenerator3.cpp#L131

To support my words I was able to rng'd a Horsea egg with the same pid/ivs that the Kingdra using lua script + battle video.

And PKHeX considered it as illegal. I use the last PKHeX version.

[kwsch]

Not a bug. Please do not report invalid encounters being flagged as invalid; they are flagged as invalid for a reason.

Hold control to see that your PIDIV is incompatible with the encounter it was matched to, hence the Encounter Type PID mismatch.

[StarfBerry]

I don't understand.
The Horsea egg has been generated by the game without any modification on my part.
So this PID + IVs can be obtained via breeding in Emerald.
There is something wrong in the legality check for eggs in Emerald.

[StarfBerry]

Okay I think I got it.
If you generate an egg which matches with PID/IVs of an other RNG Method like XD/Colo or Method 1/2/4, the egg is considered as illegal.


And as you can see this IV spread can be obtained with this PID if you have the adequate parents (pid and ivs are generated separetly).

This explain the issue with my previous Horsea. He has all characteristics of a Method H-2.

[kwsch]

Yeah, and it's not statistically probable to get a 1:billion match, hence the flag.

[StarfBerry]

But these eggs must be considered as legal.
They can be generated without using an external tool.

[kwsch]

No they cannot be obtained without an external tool or unnecessary manipulation -- you are unable to change parents once the egg is ready for pickup (PID set).

Again, the statistical improbability of randomly getting a PIDIV correlation is exponentially lower than the chance that someone hacks something with a PIDIV incorrectly.

[StarfBerry]

The first shiny Horsea has been obtained with only rng manipulations.
I rng'd both parents and I deposited them at the day care.
And I used the battle video to coincide the PRNG state with the timer value to get my target pid.
Finally I got the right ivs using PokéFinder, a rng tool.
So the egg has clearly not been hacked or something else.
This can be replicate without any rng manips. The odds are extremely low I agree but that's possible.

[kwsch]

Just because you can doesn't mean you should.