A Fire Snake in the DS Desert Hills course from Mario Kart Wii

A Podoboo in the Mario Kart Wii version of Desert Hills.

Podoboos (also known as Fire Snakes and Lava Bubbles) are obstacles, and they can be found on Grumble Volcano in Mario Kart Wii, and on the Mario Kart Wii version of Desert Hills from Mario Kart DS (they are only fireballs in the original). They hop back and forth on the track. If they are touched by a racer, the racer will spin out. On Grumble Volcano, Podoboos come from pipes, but on DS Desert Hills, the sun spawns them on the track. In Waluigi Stadium and [[Wario Stadium DS|DS Wario Stadium]], players would have to dodge Podoboo Cogs. In the Mario Kart 8 remake of DS Wario Staduim, Podoboo Cogs are in the same place as last time. However, when racing on the track, you can't see them fully as they act as a hazard between the new anti-gravity section, where each line of the Podoboo Cog comes up only once at a time.