Hello everyone. I was directed here by a kind mod since my findings would be more relevant here.
This is regarding the different Egg RNG in SM than in XYORAS. In short: Time Machine method does not exist in Pokemon Sun and Moon.
I'll dump all my findings here, so please excuse me.
My original post:
"Some background; I'm MMing for a shiny Mimikyu. 40 boxes and still no shiny unfortunately. Out of sheer curiosity, I decided to test out if the breeding RNG in SM works the same why it did in XYORAS.
In XYORAS, once the daycare man/lad has an egg, everything about it is set in stone (IVs, gender, shininess). If you save before taking the egg, hatch it, then reset and do it again, it'll be the same pokemon, no question.
The catch is that after taking that egg, the NEXT egg generated will be random. For example, you take the first egg, hatch it, then take the second egg and hatch it. If you reset and do this process again, the second egg can have a different IV spread, gender, etc.
I've been testing this in SM, and I've come across some weird results. When I save before the first egg, take it, then hatch it, it will be the same pokemon if I do this process over and over.
HOWEVER, taking any subsequent eggs and hatching them is a different story. If you take the second egg and hatch it, then reset and take the first and second eggs and hatch them again, the second egg hatched will have the SAME IVs and gender as the second egg that was hatched before the reset! This happened with at least 3 other subsequent eggs, resetting about 3 times. It was very odd.
I reset again, but this time I refused to take the first egg. I took the egg that was generated after that, and it naturally had a different IV spread than the egg I refused. But this is the WEIRD part. When I took the second egg, it still had the same IVs and gender as the second egg I took in any of the previous resets! Same goes for any subsequent eggs.
Sorry for the long-winded mechanics anecdote, I just wanted to know if anyone else knew anything about this peculiarity."
Some more testing:
"Yes, my 6IV Japanese Ditto was holding a Destiny Knot, and my Mimikyu was holding an Everstone. I tested something else just now, if that helps:
I reset again, and rejected the first egg. Instead of generating a new egg right away, I took out Ditto and Mimikyu from the daycare, and put them back in, in a different order (Previously, Ditto was deposited first and then Mimikyu, so I reversed the order).
Lo and behold, I achieved the exact same results for what happened in the last part of my original post, with the EXACT SAME IVs as the first Mimikyu after the rejected egg for the first egg generated in this test. The second, third, etc. Mimikyu were the exact same as any of the tests I had done previously.
Now I'm testing for what would happen if I put a DIFFERENT Mimikyu but use the same Ditto to generate more eggs. I'll report back in a couple minutes."
Some MORE testing (and wishful thinking):
"I'm back. I tried it with the two different Mimikyus. However this is only raising more questions than answers....
I reset, reject the first egg as always. I take out the Mimikyu in the daycare and replace it with another Mimikyu. I generate and take 4 eggs after that exchange. The first two Mimikyu eggs are different, but then the last two ARE THE SAME AS ALL THE PREVIOUS TESTS.
I'm starting to think there's some sort of broken RNG with eggs. Perhaps we can see the return of RNG Manipulation or something akin to Instacheck in the near future?"
And the big kicker:
"I noticed this too.
I was MMing for a shiny Dewpider. After hundreds of eggs, one hatched shiny but my 3DS died. Not that I minded since it wasn't the gender I wanted.
I hadn't saved and went back to hatching eggs. Turns out the exact same shiny reappeared. Curious, I soft reseted and after a bunch of identical eggs, the same shiny showed up again.
Then I changed the Dewpider in the nursery with another one: exact same result.
I was trying to SR to change the gender but absolutely none of the eggs change.
Since I didn't want a female Dewpider, I SR again and replaced the Dewpider in the nursery with a Mimikyu since I did want a female Mimikyu.
Exact shiny hatched again (same nature, IV spread, even characteristic) but this time it was a Mimikyu.
Though I didn't reject any eggs because I was lucky enough to save my game when the lady's sister didn't have any eggs to give me.
It seems as if eggs are fixed no matter the parents."
Can anyone tell me what's going on? Is Egg RNG broken in S/M?
Edit: Formatting