After being jailed for solving another mystery, the Mystery Inc. gang stumbles upon another mystery: a gruesome monster lurking underneath the town and cocooning everyone who comes near in green goop.

The gang decides to launch an investigation into the existence of a mythical ghost town that is believed to have been populated by alligators.

Strange things continue happening in Crystal Cove, when doorknobs suddenly vanish and a priceless diamond is hidden somewhere. To top it all off, a mysterious Ghost Trucker is also scaring the town.

A Man Crab attacks Crystal Cove beach during a volleyball tournament for Trickell's Triquid diet mixture. The gang must stop him and solve this mystery before the tournament's female players, who the Man Crab has taken a liking to, are put in danger. Meanwhile, Velma gets some relationship advice from Daphne.

The children of Crystal Cove are being turned into monsters by a creature named Que Horrifico, scaring all of the adults in town. As a result, they abandon their children and run for their lives.

Fred becomes the target of a high school crush when new girl Alice May falls for him. However, Alice May is actually a ghost with a reputation for taking guys with her and making them disappear forever.

The Hex Girls, Velma's favorite band, come to Crystal Cove and plan to give the gang a concert. But things go awry when The Phantom, an evil specter, suddenly appears with the intention of permanently taking The Hex Girls out of the music business.

The gang attends the Royal Knights Faire in Crystal Cove, but so does an unexpected guest. A scary-looking gnome is paralyzing everyone wearing pirate costumes at the faire.

When two giant monsters start to attack Crystal Cove, Mayor Jones asks Fred and the gang to help him and the sheriff capture them. Meanwhile, Shaggy has to choose between his relationship with Velma and his friendship with Scooby.

A monster called the Fright Hound starts attacking Crystal Cove and people believe Scooby-Doo is behind it. Could Scooby be the one attacking the city or is someone setting him up?

There's a vampire loose in Crystal Cove, terrorizing the residents and stealing an odd assortment of loot. When the gang does some sniffing around, they discover an unlikely suspect… Daphne's MOTHER. Things are already strained within Mystery Inc., and with this latest blow, the gang is truly torn in half. Girls on one side, boys on the other.

The gang investigates after Crystal Cove begins suffering from an infestation of deadly insects that targets workers of the company Destroido, the company that makes Shaggy and Scooby's favorite snacks.

Sick in bed right before the big Mystery Solvers Club State Finals, Scooby dreams about going to the competition and teaming up with fellow mystery-solver sidekicks Speed Buggy, Jabberjaw, Captain Caveman and The Funky Phantom to rescue their friends from the clutches of the demonic Lord Infernicus.

When Fred invites the gang on his and Daphne's second date, it pushes Daphne into the arms of Obnarb, the leader of an Orc Biker group called the Wild Brood who have come into town. When a break in at the armory happens and a dangerous weapon is stolen, the Wild Brood are the top suspects. It's up to the gang to solve this mystery, save the Wild Brood, and find the imposter Orc Biker.

When Fred's favorite adventurer, Dr. Rick Spartan, starts teaching biology at the Crystal Cove's High School, the gang gets to meet him. Fred tells him that the gang has also been into some terrifying experiences, Spartan immediately invites them to have dinner at his place, where he promises to show them his latest trophy, the cursed Shrunken Head of Squar Gringot. But when its headless body appears and threatens to pursue the professor until the end of his days for plundering its tomb, the gang must find out a way to break the curse.

The ghost of Crystal Cove's most famous sheriff, Death Justice, has come back from his grave to make Sheriff Stone quit his job by trapping Crystal Cove's top criminals. Can Scooby and the gang stop Death Justice before it's too late?

A high-tech creature called Obliteratrix attacks the gang and forces them to investigate the case of the haunted treasure with the help of H.P. Hatecraft.

The gang finally follows the trail to find the hidden treasure, but they didn't think The Freak would go after them. On the other hand, many truths are revealed, including the goal of Professor Pericles and the true identity of Fred's parents. And as if that were not enough, the gang faces a big problem when the parents get angry due to the behavior of their sons. And just when the mystery of the town is at its highest level, does this mean the end of the gang or the beginning of a new problem?

Mystery Inc. has disbanded. Crystal Cove is attacked by a Man-Baby called Crybaby Clown. Mayor Nettles is approached by a mysterious figure who gives her the files on Mystery Inc. while stating that she has to get Mystery Inc. back together.

Velma and Hot Dog Water go to Russia on a mission for Mr E, and bring back an old house which springs legs and runs rampage over town. Meanwhile the gang are looking to replace Daphne and Velma suggests Hot Dog Water.

Dreamweaver has come to life brainwashing an old group of Crypts and Creepers players (including Sheriff Bronson Stone) by entering their minds while they sleep!

A creature called The Hodag of Horror attacks Crystal Cove; meanwhile, Brad Chiles and Judy Reeves (Fred’s real parents) have suddenly appeared along with a dog whom Scooby has taken a fancy to.

An artist's painting comes to life and attacks patrons of the museum. The gang is asked to solve the mystery so the Art Museum can be saved.

An artist's painting comes to life and attacks patrons of the museum. The gang is asked to solve the mystery so the Art Museum can be saved.

Hebediah Grim, a pilgrim monster is targeting, attacking and judging certain women of Crystal Cove at the lover's hot spot, Lover's Lane.

Deep-sea robots attack Cassidy. The gang helps her solve the case of who is sending them.

A bear-like creature attacks Mayor Nettles and Sheriff Stone in the Crystal Cove woods near Destroido. They turn to the gang for help, explaining that the creature is called the Scarebear and has been stalking the grounds near the Destroido company for weeks. The gang finds out that the Destroido company has allowed toxic lithium to spill into the woods, which has resulted in the mutations of inhabitant plants and creatures including the Scarebear. Meanwhile, Mr. E and Professor Pericles have recruited Brad and Judy to help them find the gang's pieces of the Planispheric Disk, and have resorted to drastic measures to get the gang out of the way.

An evil goat man named Krampus sends the gang on a quest.

The gang investigates Sheriff Stone's alien abduction claims while real aliens are stealing valuables from Crystal Cove.

Professor Pericles creates a herd of mutant cattle to destroy Crystal Cove in an attempt to locate the Planispheric Disk.

A deceased ska band returns from the grave and hypnotizes partygoers at the local nightclub to dance to their music. The gang is called to solve the mystery before they dance themselves to death.

A polite Englishman in a mask calling himself the Dandy Highwayman kidnaps several women from around Crystal Cove, including Mayor Nettles, Daphne, and Mrs. Blake.

Professor Pericles tries to find the entrance into the caverns where the cursed treasure and the evil entity are buried.

The heroes must work together to realize that their love for each other is the true Heart of the Jaguar.