Quote Originally Posted by a person View Post
While I'm no expert, isn't the PID RNG separate from the Mersenne Twister RNG? Meaning that if the gender and nature are the same after resetting, we can conclude that shininess will be as well?
Nature, IVs are different every time. I just tested it on a Combee (It was Male this time. Aww...) and one time it was Careful nature, and the 2nd time it was Docile Nature.

Victini had a Shiny Lock because of a script in the code where if it would be a Shiny, it'll calculate it again until it's not a Shiny.