Taking place in a Manhattan apartment building, Max's life as a favorite pet is turned upside down when his owner Katie brings home a sloppy mongrel named Duke, who was rescued from the pound. Little do they know, they have to put their quarrels behind when an adorable white rabbit named Snowball, the leader of an army of abandoned pets – called the "Flushed Pets" – is determined to take revenge on all happily-owned pets and their owners.
A short time after the first film, Mavis (Selena Gomez) and her fiance Johnny (Andy Samberg) are married, with the approval of her father Dracula (Adam Sandler) and the world has become aware of (and unfased by) the existence of monsters. Mavis later reveals to Drac that she is pregnant and a year later, she gives birth to a son named Dennis (Asher Blinkoff), who befriends Wayne's werewolf pup daughter Winnie (Sadie Sandler). Nearing his fifth birthday, Dennis has yet to grow his fangs and Drac worries that his grandson might not gain vampire powers. Noticing the dangers of Transylvania, Mavis starts to consider raising Dennis where Johnny grew up, much to Drac's disapproval.
Misfit parapsychologists Peter Venkman, Raymond Stantz, and Egon Spengler are called to the New York Public Library after a series of apparent paranormal activities, where they encounter the ghost of a dead librarian but are frightened away when she transforms into a horrifying monster.
A vindictive woman, Carrigan Crittenden, is upset upon the reading of her late father's will that she was given creepy Whipstaff Manor in Friendship, Maine instead of his fortune, but she changes her tune when she learns that there is a hidden treasure within the property. She and her assistant Dibs go to the house attempting to investigate, but discover that it is haunted by a friendly ghost named Casper and his obnoxious prankster uncles, the Ghostly Trio (Fatso, Stretch and Stinkie), who immediately frighten them off the property. Carrigan tries multiple methods to rid the house of ghosts, but fails time and time again. Meanwhile, Casper sees a report of a paranormal therapist, James Harvey, and is immediately smitten with his teenaged daughter Kat. He quickly inhabits the television in Carrigan's hotel room in order to convince her to have the Harveys come to the manor to investigate the haunting.
Abandoned by their father deep in a forest, young Hansel and Gretel enter a gingerbread house and are captured by a cannibalistic witch. The witch forces Hansel to continuously eat candy to fatten him up, and enslaves Gretel, ordering her to prepare the oven, but the siblings outsmart her and incinerate her in the fire of the oven. In the fifteen years that follow, Hansel and Gretel become famed witch hunters, slaying hundreds of witches. The pair find that they are somehow immune to spells and curses, but the incident in the gingerbread house has left Hansel diabetic. He needs a shot of insulin every few hours or he will get sick and die.
Five years after saving New York City from the demi-god Gozer, the Ghostbusters—Egon Spengler, Ray Stantz, Peter Venkman, and Winston Zeddemore—have gone their separate ways after having been sued by the city for property damage and barred from investigating the supernatural, forcing them out of business. Ray owns an occult bookstore and works as an unpopular children's entertainer with Winston, Egon works in a laboratory on the Columbia University campus, conducting experiments into human emotion, and Peter hosts a pseudo-psychic television show. Peter's former girlfriend Dana Barrett has had a son, Oscar, with a violinist that she married then divorced when he received an offer to join the London Symphony Orchestra. In order to take care of her baby, Dana quit her former cellist profession and now works as a restorer at the fictional Manhattan Museum of Art, working to prepare a malevolent-looking portrait of a legendary sixteenth-century tyrant named Vigo the Carpathian of Moldavia for an upcoming exhibition.
Mystery Inc. (Fred, Daphne, Velma, Shaggy and Scooby-Doo) attend the opening of an exhibition at the Coolsonian Criminology Museum commemorating their past solved cases with monster costumes on display. However, the celebrations are interrupted by the Evil Masked Figure who steals two costumes using the reanimated Pterodactyl Ghost. The gang are ridiculed by journalist Heather Jasper Howe who starts a smear campaign against them. Concluding an old enemy is the mastermind, the gang revisit old cases, dismissing the former Pterodactyl Ghost, Jonathan Jacobo, due to his death during a failed prison escape, they guess Jeremiah Wickles, the Black Knight Ghost’s portrayer, is the culprit.
While attending a preview of the film Stab, a film within a film based on the Woodsboro murders depicted in Scream, two Ohio Windsor College seniors, Maureen Evans and Phil Stevens are murdered by Ghostface. Phil is stabbed through the ear in a bathroom stall while trying to eavesdrop on strange whimpering noises. The killer, wearing a Ghostface costume, then returns to the screening and sits beside Maureen, before mortally stabbing her. At first the audience believe she is part of the raucuous acting out by audience members, until she falls dead in front of the cinema screen.
Zach Cooper (Dylan Minnette) and his mother Gale (Amy Ryan) move from New York to the fictional town of Madison, Delaware. Their new neighbors are the mysterious "Mr. Shivers" (Jack Black) and his daughter Hannah (Odeya Rush), but when Zach tries to introduce himself, Mr. Shivers warns him to stay away from them. At school, Zach befriends Champ (Ryan Lee), an often bullied, socially awkward student. One night, Zach hears Mr. Shivers and Hannah arguing from his window, followed by Hannah screaming. He calls the police, but Mr. Shivers assures the officers that nothing is wrong and the scream was from a movie. Fearing Hannah is in danger, Zach tricks Mr. Shivers into going to the police station for further questioning.
Randall “Rand” Peltzer, a struggling inventor, visits a Chinatown antique store in the hope to find a Christmas present for his son Billy. In the store, Randall encounters a small, furry creature called a Mogwai. The owner Mr. Wing refuses to sell the creature to Rand, so his grandson secretly sells the Mogwai to Rand but tells him to remember three important rules that must never be broken – do not expose the Mogwai to bright lights or sunlight which will kill it, do not let it get wet, and never feed it after midnight.
Will Randall is bitten by a wolf while driving home in Vermont. Afterwards, he is demoted from editor-in-chief of a publishing house when it is taken over by tycoon Raymond Alden, who replaces him with Will's protégé Stewart Swinton. When Will thinks that his wife Charlotte is having an affair with Stewart, he rushes over to his house where Stewart sees Will angry and asks him what the problem is. Will bites Stewart and rushes upstairs to the room to find Charlotte half-naked. His worst fears are confirmed. Will becomes more aggressive, taking on the characteristics of a wolf.
Jay Baruchel arrives in Los Angeles to visit with old friend and fellow actor Seth Rogen, who invites him to attend a housewarming party hosted by James Franco. Jay is uncomfortable being around so many people he hardly knows, so Seth accompanies him to a convenience store for cigarettes.
About eight years after a zombie apocalypse, R, a zombie, spends his days wandering around an airport which is now filled with hordes of his fellow undead, including his best friend M. R and M achieve rudimentary communication with grunts and moans and occasional near-words. As a zombie, R constantly craves human flesh, especially brains, as he is able to "feel alive" through the victims' memories he experiences when he eats them.
The film picks up immediately after the end of the last film, with Marybeth Dunston (Danielle Harris) blowing off the head of Victor Crowley (Kane Hodder) with a shotgun. She walks away and comes across the bodies of Vernon and John, where she hears Crowley in the woods. Marybeth starts up the chainsaw, but is grabbed by Victor. Marybeth kicks him, and he falls backwards onto the chainsaw, cutting him down the middle. She grabs a shotgun from one of the men and shoots Victor's head, and walks back into the city. She walks into the Jefferson Parish Police Department, immediately having guns drawn on her. Upon discovery of the twenty to thirty bodies at Honey Island Swamp, she is placed as the prime suspect in the murders by Sheriff Fowler (Zach Galligan), even after telling him numerous times about the events of the last two films. The Sheriff heads out to the swamp with the paramedics and fire department, leaving Deputy Winslow (Robert Diago DoQui) in charge of the station until he gets back.