Three ghosts that Slimer accidentally releases from a containment unit set out to put Ghostbusters out of business by opening a business called Ghosts R Us.

A ghost named Killerwatt, who has the ability to possess electrical devices, takes control of New York City's power grid.

Peter gets possessed by a ghost named Watts who disguises itself as a kindly old lady and traps the Ghostbusters in a haunted house.

Slimer runs away after being yelled at by Peter for eating Winston's birthday cake; Egon discovers a poltergeist trying to absorb other ghosts in order to make himself invincible.

A group of trolls take over the Queensboro bridge and demand that the Ghostbusters find their missing cousin within 12 hours or New York is toast.

Egon is familiar with a boogeyman who is currently scaring Meghan and Kenny Carter who go to the Ghostbusters for help.