I've seen one forum post before about this, but it was about a month ago and I've seen nothing happen.
Right now ZM12 is broken, the ??? that spawns the enemy in Quicksand Caves is not appearing, I'm not the only one this is happening to, and I've made several attempts to get it. With the new Geomagnetic Founts it's very easy to get to it so I try to check it often. No matter what though it's never shown up for me. Please get this fixed ASAP so I can get Sky access.