So I went on to the PSS and somehow only tagged 27 people for bases. Then guess what? I passed by 3 people (I don't even know how so little)! So is the range of secret bases need to get the Crescent Isle really somewhere from 28-31 or is it still unfound? It would be really cool to find out first!
It was discoverd on smogon already, so yes you have. EDIT:meant serebii, mabye smogon to.