Ribops is the mini boss for Popla Cocapetri's stage. Ribops is actually a giant building and security system. It has eight key disks which Zero can destroy or pluck out with the Zero Knuckle. Once he does, it will be destroyed and sink into the ground. Of course, to make things more difficult, there are Bonsects and Triaformers trying to bomb Zero or shoot him with stars.
Ribops is divided into two sections: the middle, and the top. Finishing Ribops by pulling the last disk on either section will land Zero in two different routes.