Volcanic debris

are molten rocks falling from the background. They only appear in World 8-8 of New Super Mario Bros., which is a level with many Kab-ombs. These rocks destroy blocks and set off the fuses on Kab-ombs, not to mention hurting Mario or Luigi if they touch one. Mario and Luigi can, however, take refuge under the dark floating platforms as the debris will not penetrate this.

Raining Debris reappear in New Super Mario Bros. Wii, mostly found in World 8-1. In this game, they are much harder to dodge as Mario has to jump through a lava-filled land with mostly small platforms to jump on, drifting poisonous clouds, and rising lava spouts.

Raining Debris appear in New Super Mario Bros. 2, where they act just like they did in the predecessor. They are first found in World 6-1.

Raining Debris return to New Super Mario Bros. U. In this game, they resemble more of a Fireball but its function in this game is the same as in the prequels, only occur in Peach Castle, Meteor Moat and in the secret level Firefall Cliffs. Bowser's fireballs in The Final Battle are identical to Raining Debris. These obstacles also appear in the challenge Cloudy with a Chance of Fire.

Raining Debris also appears in Super Mario 3D World making their first appearance in a 3D Mario platformer game. they look similar to its appearance in New Super Mario Bros U and act similarly to the previous installments with the difference that now create molten fire puddles that will damages the player if they touch it. they only appear in The Great Tower of Bowser Land where once again they are expelled by a volcano in the background and also in Hisstocrat Returns and Boss Blitz where are generated by Queen Hisstocrat.