The Sky Factory (referred to as the Flying Factory in the series) is one of Romeo's inventions. It is a factory that travels in the air and expels gum clouds to pollute the environment. It also has a control room to control the factory and the machines that it contains, such as its metal-sucking nozzle vacuum and a freeze ray. The Fly Bots take care of the factory for Romeo, while Robette serves as the co-pilot of the factory.
In "Protector of the Sky", Romeo used the factory to spread gunk clouds around the city and suck up everything using its metal-sucking nozzle machine. However, after a minor fight, the PJ Masks managed to stop Romeo by overriding the controls, causing the nozzle to suck up the gunk clouds and mess with the controls. Romeo and Robot tried to go after the team, but they ended up falling off the factory and into one of the gunk clouds, so they could not cause any trouble again that time.
In "PJ Sky Pirates", Romeo's Lab was being kept in the factory. It has yet to be determined if he will use the vehicle again in the future, although he likely will. This is proven to be true, as the lab was seen "Big Sister Motsuki".
In "Master of the Moat", Romeo uses the sky crystal to make his own world in the clouds.
In "PJ Robot Vs Romeo", the Sky Factory was losing pieces and Romeo and PJ Robot, despite not wanting to do it at first causing Robot to initiate psychiatrist mode, decide to work together while the PJs collect stray pieces.