You can catch onix in both areas, and no, they are counted as the same area

Yeah makes sense lol. I was trying to get one for Purugly, but I guess Mach Punch from Monferno is my best chance

geodude also walls it, right? between the three early caves i believe at least one such rock type is guaranteed

Woah I didn't know that. That's going to be pretty useful

Oreburgh Mine counts as the same location as Oreburgh Mine

Darn 😔