King Thwomp appeared to be a normal Thwomp that Kamek enlarged.
King Thwomp behaves similar to a regular Thwomp, but moves from side to side in addition to dropping when Mario is underneath, which will break a layer of the blocks that make up the floor. When all layers have a hole through them, Mario and company must aggro him to force him to crash through the floor, and fall into the bottomless pit below.
- The fight with King Thwomp is similar to the final battle against Bowser in Super Mario Bros. 3, as players must force the boss to fall into a bottomless pit sealed by layers of blocks.
- The Winged Thwomp in Super Mario Maker behaves similarly to this boss, moving from side to side when not dropping or rising.