Editing Grumblump

'''Grumblumps''' are large multicolored crystal blocks in ''[[Super Mario 3D World]]'' and its [[Nintendo Switch]] port, ''[[Super Mario 3D World + Bowser's Fury]]''. They exclusively appear in [[Grumblump Inferno]] in the ''Super Mario 3D World'' campaign. They are shaped like rectangular prisms with various proportions, including cubes. Several Grumblumps appear waiting in [[lava]] throughout the level. Once the player steps on a Grumblump, its smiling faces on each side turn into frowning faces, and it starts gradually moving along a set path through the lava, turning over on one of its sides at a time. The player must move with it to stay on top of the side currently facing upward, and avoid falling into the lava until it reaches the end of its path.  

As a Grumblump turns, the player can either [[jump]] to land on the topmost face or walk up its side like a [[Triangular Block]]. Towards the end of the level, two [[Skipsqueak]]s appear on either side of the final Grumblump as obstacles, running to stay on its center as it moves. If the player [[Ground Pound|ground-pound]]s a Grumblump, its faces will turn angry, and it will move faster for a short period of time; this allows the player to clear the course faster but makes the it trickier to clear.

Although visually similar to [[Rhomp]]s and [[Tox Box]]es, Grumblumps have a different behavior, as they are constantly rotating objects used as platforms. They cannot crush the player, as the lava beneath them instantly causes a life to be lost on contact.