The masks used to be regular masks that the children of Tarabiscoville planned to wear to a Jayden Houston concert. With help of a special mind control chip inserted in the mask, Romeo turned them into mind controling masks that put the wearer in a trance where they do everything Romeo commands them. He had Robot slip the first few masks onto some sleeping kids, and used those kids to distribute the masks across the city using a machine to make more masks. The chips also proved to work in combination with the PJ Masks' masks, as Romeo could take control of Gekko and Owlette with them. All masks were collectively controlled through an antenna, which is operated by a remote.