Lava swell

Lava wave is a type of harmful hazard where lava moves up in waves in Super Mario franchise.

New Super Mario Bros. Wii
Lava waves debuts in New Super Mario Bros. Wii, where it appears in two levels. In World 8-3, lava waves constantly move to the left. In, lava waves are created when Bowser stomps in lava.

Super Mario Galaxy 2
File:SMG2 Melty Monster Magma Sea Dual Image.png|thumb|left|Lava waves at the Magma Sea Planet]] In Super Mario Galaxy 2, Lava waves appear in Melty Monster Galaxy on the Magma Sea Planet.

New Super Mario Bros. U / New Super Luigi U / New Super Mario Bros. U Deluxe
In New Super Mario Bros. U, Lava waves appear in Iggy's Volcanic Castle.

In New Super Luigi U, Lava waves appear in Iggy's Swinging-Chains Castle.

Super Smash Bros. Brawl / Super Smash Bros. for Wii U / Super Smash Bros. Ultimate
Lava waves appear in Norfair. Once it touches the player, it instantly knocks them out of the stage.