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

Attention MarioWiki users!: This section is short or lacks sufficient information. Whether you are commenting or editing, we would appreciate it if you help MarioWiki by expanding it.

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.