I highly doubt it would matter either way as whoever runs the meta said they would allow unreleased stones anyway.I don't want to get everyone's hopes up, but since everyone is playing the same illegal moon ROM, there's a good chance this isn't the case.
There are 19 buyable stones in Moon. There are 19 non-legendary, non-starter missing stones. Gee, I wonder where you might be able to get those 19 stones? They're version exclusive if you're a little dense
This still leaves the Hoenn starters and Legendary mega stones in the dark, but that's a significantly larger pool than this post implies.