The Ghost Zone is protected by a net-like energy barrier, established by the Great Queen Scary Godmother, that divides Fright Side from Human World, resting in the pseudo space only Frightside residents/ghosts below A-class can pass through it. A more powerful net was going to be made, but net energy was the energy most easily spread, to cover the distance in the pseudo space. First appeared in Tommy Dickles, Scary Godmother and The Attack on Frightside.