Slimer accidentally releases three ghosts from the containment unit and they set out to put Ghostbusters out of business by opening their own business, 'Ghosts R Us'.

With New York being plagued by power outages, the Ghostbusters set about to capture Killerwatt, a ghost who has the ability to possess electrical devices. But things take a turn for the worse when Killerwatt takes control of the city's power grid.

A little old lady named Mrs. Rogers calls the Ghostbusters about her haunted house; once inside, Egon discovers the house is being controlled by a creature named 'Watt'.

Slimer leaves home after Peter yells at him for eating Winston's birthday cake, and the Ghostbusters set out to find him. But more problems arise when Egon discovers a poltergeist feeding off the power of ghosts in the local area; who only needs one more ghost to reach his full power.

Bunch of funky dangerous trolls take over the Queensboro Bridge with only one demand - the Ghostbusters must find and bring back their little cousin who ran away to party. They have 12 hours to get him back, or New York is toast.

The guys are hired by a pair of young siblings to rid them of the Bogeyman, an entity Egon is quite familiar with.