Shhwonk Fortress

Shhwonk Fortress is an underground fortress in Paper Mario: The Thousand Year Door where the Moon Stone and the Sun Stone are kept. It's past Petalburg and a few smaller stone fortresses. The Stone Keys are used to open the pipe to Hooktail Castle. Mario and Goombella must fight Fuzzies here as well as participate in a quiz show with a Thwomp.