Firekeeper

Hello @thuytien, Sorry for the inconvenience caused, it has been forwarded to the developers so they can look into it. Thanks for reporting it.

Hello FilDC The answer to your question is no, Master Sirhc only saves Nature, Ability, EVs and Moveset. That means that if you change your Legendary's IVs with a reroll, whenever you try to load your Bold Zapdos set, it will not get the previous IVs, they will remain the same.