Grumblump Inferno is a level of World Bowser in Super Mario 3D World.


Most of the level has you riding rotating Grumblumps on top of lava, which is an instant kill


This level starts on a platform with a Grumblump nearby. The Grumblump takes the player to another one, the only difference between them being that the second Grumblump is cube shaped. After navigating past some lava pathways, the player eventually reaches another platform with two Hammer Bros. and the Checkpoint Flag. The third Grumblump takes the player to another platform which houses some Splorches. The fourth and final Grumblump eventually transports the player to the Goal Pole.

Green Stars

  • Green Star 1: When you reach an area filled with piranha plants, you will see the star on a platform. Jump to get the star and get back on the Grumblump when it passes.
  • Green Star 2: When you find a star-shaped coin ring, touch it to generate eight coins. You have a few seconds to collect every coin and reveal the star.
  • Green Star 3: On the last Grumblump, wait until you see the star in the air. When the Grumblump is upwards, jump and get the star.


Grumblump Inferno Stamp.png

After the checkpoint, there is a long pillar with a fire bro and the stamp. Jump off to get the stamp and wait for the next Grumblump to pass.