The Marble Zone has pools of boiling lava everywhere with small isles situated in them, along with ancient ruins covered partially in overgrowth. It also has traps like crusher weights.
Some time after Sonic returned from another trip to the Marble Zone, Tufftee ran off to there with an old pair of Sonic's Power Boots so he could fight Robotnik. However, he was captured and tormented by a gang of Badniks who planned to turn him into a Badnik with a Portable Badnik Processor. Fortunately, Sonic arrived in time to destroy the Badniks and save Tufftte, who in turn saved Sonic when he was about to be skewered by a local crusher weight trap.
- Although it is mentioned that the Green Hill Zone and the Marble Zone are close to each other, Sonic still jumps through a Giant Ring in order to get there. It can thus not be verified of whether they are on the same island or not.