The Quartz Quadrant boss is the fourth boss encountered in Sonic the Hedgehog CD in Quartz Quadrant, piloted by Dr. Robotnik.


Once Sonic runs into the arena, he will find an indestructible booth separating him and Robotnik. Here, the booth is colored blue in the bad future timeline while in the good future timeline, it is colored purple.

A conveyor belt will activate while spikes lower from the left side of the screen to block the entrance. The only solution is to hit the booth to make it drop to the ground, then run along the conveyor belt. While this happens, the doctor moves a crane and drops small mines, which detonate into four small mines that don't travel very far at all. The booth that contains Robotnik, however, will lower against the conveyor belt and begin to wear away at the bottom the more Sonic runs along the belt; sections of the booth's base will wear away and cause the machine to lower further. Eventually, the doctor will panic about the lack of ground left to stand on without being dropped into a spiky doom, so he will run away, the machine will explode, and the player is granted access to the end of the zone.


Name Artist(s) Length Music Track
Robotnik Sterling w/Armando Peraza, Bobby Vega 1:25
Boss!!! Naofumi Hataya 3:05

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