Forum Thread
how do I check which number OS is my pokemon?
Forum-Index → Help → Answered → how do I check which number OS is my pokemon?"Sitewide frequency: 8 / 7,387"
The left number is the number of shinies OS, and the right number is the number of normal variants OS.
Unfortunately, this is only accurate at the moment of obtaining/evolving/form-changing the mon. There's currently no way to check OS for already obtained/evolved/form-changed mon. Same goes for most brand new events, which do not have a dex entry.