I have gone over all 100 cell locations on Serebii twice, both day and night, but I cannot find my last two cells. I thought I missed the Poni Coast ones, but I checked and they are not there. Paranoia is setting in to the point where I'm seriously considering my games data (Sun) was programmed wrong. In case it is relevant, When I first went to Poni Coast I did the Rock Smash cash grind trick with Tauros, but forget if I collected the Cores. Besides day/night, are there any other things that may have to do with me missing the cores?
Sorry this is pretty long, but I'm both desperate and this seems to be the only SM Q&A Thread.