Cleared the dungeon and gained the next stone. Boss was surprisingly easy once I figured it out. Was told to head eastward past Oasis Town ans seek out the Zombie Caravan, which only appears at night. Raced Rottytops, who gave us access to the Crackle Mound, the next dungeon.

Also bought two more Fighter Gear upgrades. The kickflip is certainly a useful move.

Oh, and I've learned that transforming back to genie form gives you I-frames. Good to know.