A Spore Launcher is a biological device created by Cobra-La to launch spores into low Earth orbit. It uses what appears to be either gas or compressed air to launch the things into orbit, the last "stage" deploying the spores into orbit. It sounds like a large rocket being launched into orbit. There were several of these in one place launching spores at different times, and gas is seen escaping from the devices as they launch. Golobulus stated that the "Fungazoids" took centuries to develop and use.
These were shown being launched as Serpentor, Nemesis Enforcer and allies from Cobra-La were en route to secure the Broadcast Energy Transmitter, and while Roadblock was escaping Cobra-La with what was left of Cobra Commander.