With the looming inevitability of Bank closing at some point after it becomes free and thus cutting off the ability to transfer Pokémon to HOME from the 3DS era and back, I have recently gone back to all of my older games after several years to begin the process of picking up all unclaimed Wonder Card gifts to transfer up. Among these was the Secret Egg event in my Black file, which is a Pidove. Having not performed RNG abuse in several years, I decided to go for the Haze Zekrom and a Meloetta first, since I figured that the Secret Egg might be more challenging. I couldn't find anything concrete on RNG abuse for the Secret Egg anywhere, but after much trial-and-error I managed to successfully RNG it, and I believe I have figured out its quirks when compared to ordinary Wonder Card RNG.
The Secret Egg uses the regular 5th Gen Wonder Card method on RNG Reporter, but with two main differences. The first difference is that the Initial PIDRNG Frame is always 3 less than what the program calculates. The seed that I used had a calculated initial frame of 53, but the actual initial frame ended up being 50. The second difference is a tricky one, and admittedly the details might differ slightly for Pansage and Axew due to it involving the fixed max IV that each of them have. For Pidove specifically, the target frame's original Attack IV is shifted over to become the HP IV instead, while the target frame's original HP IV is not used at all. This is because Pidove is meant to always have an Attack IV of 31, but it is curious that instead of simply overwriting the original Attack IV it moves it over to HP instead.
During my attempts, I hatched several incorrect Pidove whose IVs confused me because they didn't seem to match any nearby frames or ones on adjacent seeds, but it was finding a frame that was identical except for HP in one of these instances that tipped me off. Sure enough, all incorrect Pidove I had hatched so far matched this pattern where its HP IV was the frame's original Attack IV (as well as the initial frame for the seed being 3 less than expected by the program). Knowing this, I simply searched for IV sets where the HP could be anything and the Attack was 31 (since this original 31 Attack IV would be shifted to HP), and eventually found a target and managed to hit it. I now have an unremarkable Hardy 31/31/31/X/31/31 Pidove. At least Nature Mints make the Hardy nature a mild inconvenience.
While the Secret Egg Pokémon are not really exciting or special, I decided to post here just to have the info handy for anyone who might still want to RNG theirs, off the admittedly small chance that they have not yet picked it up. Of course, this is all based on my own DS Parameters and the fact that my Secret Egg is a Pidove, so there might be slight modifications that others have to make for their own RNG abuse, especially if their Secret Egg is Pansage or Axew. I do suspect, however, that Pansage and Axew follow similar IV-shifting rules as Pidove. For example, I wouldn't be surprised if Pansage's fixed 31 Special Attack IV shifts the frame's original Attack, Defense, and Special Attack IVs over to become the IVs for HP, Attack, and Defense respectively. For Axew, its fixed Speed IV of 31 might make it so that all of the frame's original IVs are shifted over in the same manner. If this is the case, it would make the HP IV for the target frame completely irrelevant for all three when searching IV sets for the Secret Egg but alas, I do not have either of those other two to test it. Perhaps someone here might test it and post their results someday.
The Secret Egg uses the regular 5th Gen Wonder Card method on RNG Reporter, but with two main differences. The first difference is that the Initial PIDRNG Frame is always 3 less than what the program calculates. The seed that I used had a calculated initial frame of 53, but the actual initial frame ended up being 50. The second difference is a tricky one, and admittedly the details might differ slightly for Pansage and Axew due to it involving the fixed max IV that each of them have. For Pidove specifically, the target frame's original Attack IV is shifted over to become the HP IV instead, while the target frame's original HP IV is not used at all. This is because Pidove is meant to always have an Attack IV of 31, but it is curious that instead of simply overwriting the original Attack IV it moves it over to HP instead.
During my attempts, I hatched several incorrect Pidove whose IVs confused me because they didn't seem to match any nearby frames or ones on adjacent seeds, but it was finding a frame that was identical except for HP in one of these instances that tipped me off. Sure enough, all incorrect Pidove I had hatched so far matched this pattern where its HP IV was the frame's original Attack IV (as well as the initial frame for the seed being 3 less than expected by the program). Knowing this, I simply searched for IV sets where the HP could be anything and the Attack was 31 (since this original 31 Attack IV would be shifted to HP), and eventually found a target and managed to hit it. I now have an unremarkable Hardy 31/31/31/X/31/31 Pidove. At least Nature Mints make the Hardy nature a mild inconvenience.
While the Secret Egg Pokémon are not really exciting or special, I decided to post here just to have the info handy for anyone who might still want to RNG theirs, off the admittedly small chance that they have not yet picked it up. Of course, this is all based on my own DS Parameters and the fact that my Secret Egg is a Pidove, so there might be slight modifications that others have to make for their own RNG abuse, especially if their Secret Egg is Pansage or Axew. I do suspect, however, that Pansage and Axew follow similar IV-shifting rules as Pidove. For example, I wouldn't be surprised if Pansage's fixed 31 Special Attack IV shifts the frame's original Attack, Defense, and Special Attack IVs over to become the IVs for HP, Attack, and Defense respectively. For Axew, its fixed Speed IV of 31 might make it so that all of the frame's original IVs are shifted over in the same manner. If this is the case, it would make the HP IV for the target frame completely irrelevant for all three when searching IV sets for the Secret Egg but alas, I do not have either of those other two to test it. Perhaps someone here might test it and post their results someday.








