A lot goes on in this one. First, our party gets "revenge" on Culex, since I wasn't leveled-up or skilled enough for the first fight. This time, we manage to get the upper hand.
After that, we return to Monstro Town. Talking to the Thwomp at least eight times makes the key fall of the hill outside. We then return to Belome's temple, and after the right phrase is displayed, we descend downward to use the key. There are lots of frog coins and flowers here.
After that, we go through Bowser's Keep. Smithy's crew has really changed the place. We manage to get a decent amount of treasure here, but I realize now that I missed Bowser's Drill-Claw. Perhaps we will have to replay that area and get the missing item.
Anyway, we're close to the end here. In the next video, we will face Exor on top of Bowser's Keep, then make way to the weapon world, and take out the final boss of the regular/non-post-game - Smithy.