After the Mystery Machine crashes into a sand dune and gets stuck near the Three Stooges' ghost town theme park, the gang try to figure out who's been scaring away the tourists.
Batman and Robin help the gang solve the mystery of a crashed plane, a punch toy filled with counterfeit money, and a house that keeps on disappearing.
When Gomez and Morticia want to go away on a second honeymoon, the group get tricked into being house sitters in the Addams Family house. But when Wednesday goes missing, there is another mystery for the gang to solve.
When the gang volunteer to drive Jonathan Winters to his friend Maude Frickert's farmhouse, they run into two shady people skulking around and a living scarecrow. It appears that Maude's secret formula, which turns a rooster into a giant, is the cause of the brouhaha.
When the gang stop at Moody Manor to get directions, they find themselves mistaken for Captain Moody's neices and nephews by an assortment of characters who all resemble Don Knotts.
When the kids return a lost dog to its owner, Phyllis Diller, they learn that someone is trying to trick her out of her jewels. Does it have something to do with Madame Zokar and the Magic Mansion?
Sandy Duncan is on the set of her latest film at Mammoth Studios. But it is due to be torn down after shooting, and replaced by a "super-duper market". However, the film is behind schedule because someone keeps disrupting the filming.
While on their honeymoon, Sonny and Cher meet up with the gang at a run down beach resort that is not what they expected. Along with the bad accommodation, there is a giant monster shark lurking around the resort grounds.
When the gang get pulled over by a local police officer, Don Knotts, they spend the night in the town. But it doesn't take long before the gang find another strange mystery.
On a ski trip to a lodge in Vermont, the gang meet up with Laurel and Hardy, who are trying to get a job. But when they discover the Ghost of Bigfoot is on the loose, they team up to capture him.
With the help of the Three Stooges, the gang try to capture the ghost of the Red Baron, a long dead World War I flying ace who is ruining the area's crops.
When the gang become lost in a swamp, they meet up with the Harlem Globetrotters. They soon find that the ghost of Redbeard the Pirate and his crew are trying to get rid of them, but why? And who is that strange local hermit?
A phantom knight is haunting Scottish Hagglethorn Castle, the ancestral home of famed musician, Davy Jones, which has been relocated to the United States. His uncle believes he has no choice but to hand it over to his cousin, the Duke of Strathmore, but Mystery Inc. is looking to solve the mystery.
Accepting an invitation from their friend Jerry Reed, Scooby and the gang arrive at the Country Music Hall, but Mr. Reed is nowhere to be found. Yet his music echoes through the halls.
The gang meet up with Batman and Robin for a second time, while out camping. They join forces to try and foil the Joker and the Penguin's attempts to steal Professor Flakey's flying suit.
On a trip to Shaggy's Uncle Nathaniel house, the kids and the Harlem Globetrotters must again solve a mystery, involving three ghosts and a sea serpent who are trying to keep everyone away from a cove that contains a sunken ship filled with treasure.
When they try to take a picnic cruise, the gang and the Harlem Globetrotters, get tricked into going to Haunted Island. They soon run into a mystery and it's keeping everyone awake.
With the help of Josie and the Pussycats, the gang try to fix up a run down showboat, so it can open for business. But their efforts are hindered by the ghosts of Captain Scavenger and Injun Joe.
Scooby and the gang, along with Jeannie and Babu, help a prince battle the evil spirit that was let out of a bottle. But who did it and why?
Returning to Velma's old high school, the gang meet the coach, Tim Conway, who is about to lose his job if they can't help him rid the school of the ghost of a former athlete.
Don Adams is working as a bug exterminator who has been contracted by the bank to exterminate insects in the house of old film director, Lorne Chumley. Chumley's butler tries to persuade the Gang and Don Adams to leave, but Adams will not be deterred, despite many strange things happening in the house.
While on their way to the Oceanside Auto Rally, the Gang spend the night in the recently deserted city of Winona. In the morning they meet Speed Buggy and his crew, and together they try to determine where the haunting winds are coming from.
The kids come across a message and a key in a chocolate bar belonging to the Sugar Plum Candy Factory, recently bought by Cass Elliot (a singer from The Mamas and the Papas). When her watchman goes missing and Green Glob Ghosts are on the loose, the kids find a ton of mysteries.
When no one shows up at his carnival, Dick Van Dyke enlists the help of the kids to track down the ghost that is scaring away his customers.
In a spoof of 1972's The New Scooby-Doo Movies, Scooby-Doo and the Mystery Inc. gang pick up a hitchhiking Gary Coleman. Soon after the Mystery Machine proceeds to break down (multiple times) leaving them stranded at a haunted castle owned by David Cross
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