Scooby-Doo! Mystery Incorporated

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.

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.

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.

The Hex Girls (consists of Thorne, Dusk, and Luna), Velmas 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.

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.

Theres 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… Daphnes 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 Scoobys favorite snacks.

When Fred invites the gang on his and Daphnes 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. Its up to the gang to solve this mystery, save the Wild Brood, and find the imposter Orc Biker.

When the gang goes on a quest to find out what happened to the original Mystery Incorporated group on their last case of the 75 year old disappearance of the Darrow Family and their mansion, they find themselves trapped in the underground Darrow Mansion, which has been booby trapped. Will the gang solve the mystery and escape with their lives?

Scooby and Shaggy win an essay contest to have dinner with Vincent Van Ghoul. They go to his mansion and are attacked by a monster who calls himself Nightfright. Shaggy calls the gang and the gang rushes over. The are chased by Nightfright and go into a room and lock the door. Fred makes a trap and asks Vincent to lure the monster into it. Finally, they catch Nightfright in Freds trap. The end of the episode shows them eating dinner, Daphne devouring everything in sight because she has not eaten for hours.

When Mayor Jones buys online an ancient Persian temple, in order to boost business in Crystal Coves amusement Park, "Creepy Spooky Terror Land", he never thought that that temple would come with a Manticore, a vicious mythological animal, who is been eating the parks visitors. Having no other option, he asks Fred and the gang to help him capture the beast, and while they do it, he does some snooping around, regarding the mysterious puzzle piece that the gang found in Darrow Mansion.

When Freds dad is being attacked by an unknown shadowy figure its up to Scooby and the gang to get to the bottom of the mystery. Will they be able to, or will Fred have to give up mystery solving forever? And what does the puzzle piece Freds dad possesses have to do with it all?

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.

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.

Fred tries to get Daphne back. Crybaby Clown returns to rob Crystal Cove and kidnaps Daphne as well. Daphne is rescued and agrees to return to the gang. Mr. E tries to re-recruit Angel Dynamite.

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 artists 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 lovers hot spot, Lovers Lane.

A robot disguised as a Nazi World War II soldier attacks Cassidy Williams at her radio station, eventually self-destructing as Cassidy fights back, taking the entire building with it. She explains to the gang that these robots have been attacking her for the past week. Robots continue to attack the gang as they investigate. When the gang realizes that the robots are coming from deep underwater, Daphne recruits two of her babysitting charges, Tom and Tub, and their seal (also named Scooby), to transport the gang in their submarine to the robots spawning vats, in an area the kids call "The Midnight Zone". Shortly after submerging, the sub is attacked by a group of robots and damaged, and the gang stumble upon an underwater base and attempt to use it to repair the sub, only to discover that the base is the factory where the robots are constructed, run by Professor Pericles. In the end, Pericles escapes leaving the laboratory to self-destruct, possibly killing Cassidy Williams as the gang, Tom and Tub, and Scooby the Seal escape.

A teenager vandalising a neighborhood is attacked by a creature calling itself "Krampus," leaving his hair snow-white with fear. Three more kids are attacked as the gang meets Mayor Nettles and Sheriff Stone at the roller rink and arcade. Realizing that Krampus attacks "bad kids" such as the aforementioned teenager, the gang turn to the imprisoned Mary-Ann Gleardon for help only to have Krampus attack and kidnap her from prison. In the end, its revealed that the gang had enrolled the forces of Hot Dog Water, Jason Wyatt, Mary-Ann Gleardon, Ex-Mayor Fred Jones Sr., and Charlie the Robot (from the Haunted Museum exhibition) in an elaborate scheme to steal the original Mystery Incorporateds pieces of the Planispheric Disk. After the gang reassembles the disk, the eyes of the Crystal Coffin glow and it mutters "Nibiru."

The Crystal Cove Haunted Historical Society performs reenactments of Crystal Cove history every year. During a rehearsal for this years production, a Phantom Mummy resembling one of the props scares off the cast and crew members. Vincent Van Ghoul, called upon to take over production, finds the set destroyed and calls in Mystery Incorporated, who become the new cast and crew for the play. Meanwhile, Professor Pericles recruits Brad and Judy to steal the Planispheric Disk back from the gang.

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

A gluttonous monster attacks Francilee Jackson on her cooking show. As the gang attempts to eat dinner together, the restaurant is crashed by Rick Spartan and Cachinga, who are on the hunt for the monster. The monster attacks various locations around Crystal Cove, including various restaurants and the museum where Velmas mom works. Meanwhile, Professor Pericles has gone crazy, leaving Mr. E to attempt to seek the treasure without him. Brad and Judy tell Pericles of Es mutiny, and Pericles uses venom injections to force Mr. E to work for him.

As the gang investigates a haunted house, a man resembling Fred pulls Fred through a mirror and takes him to a world where the Planispheric Disk destroyed all of Crystal Cove. Meanwhile, in the real world, Fred begins acting strangely. The real Fred manages to tell the gang that the Fred in their world is fake, having discovered so when a fake Daphne in the "mirror world" gave herself away. When the ruse is discovered, Professor Pericles uses the Kriegstaffelbots to threaten Daphne in order for the Planispheric Disk to be surrendered to him. When Professor Pericles gets the Planispheric Disk, he makes plans to free his "master.

The gang, accompanied by Velmas mom, goes to Yucatán in an attempt to search for the Heart of the Jaguar after Angies old friend, Professor Enrique Andelusossa, is "consumed by the jungle" near the Temple of the Hunters (the burial site of the Hunters of Secrets where the Heart of the Jaguar is kept). Upon arriving in Yucatán, the gang visits Professor Enriques antique shop, where they are greeted by his angry wife, who says Mrs. Dinkley is to blame for his disappearance. After hours, the gang returns to the store, only to be attacked by the Mayan Priestess who warns them away from the temple. The gang ignores her threat and travels into the jungle to find the temple. Due to Freds master trap skills, Mystery Incorporated overcomes the temples diabolical traps and discovers the Heart of the Jaguar in the tomb. The Priestess attacks, but fails and is captured by the traps in the temple, which she triggered. Afterwards, a woman who had been spying on the gang appears, but is revealed as working with Mayor Nettles.

As the gang follows the original Mystery, Inc. through the caverns, they all approach the first gate to the cursed treasure. Professor Pericles knows the gang has been following them, as he calls them out to bring the Keys in order to open the gates. The gang realizes that the Keys and their scenarios seen in the dream world is how they all apply to the gates and the gates being opened. The gang decides to cooperate, after Pericles reveals that they have Hot Dog Water, and opens the first gate. Thanks to Hot Dog Water, the gang enters the first gate; however, Hot Dog Water is killed by the Kriegstaffelbots nearly straight afterwards. The gang arrives at the second gate, and opens it using the mortar bowl. They enter a mysterious rock dimension, where they are greeted and chased by a Rock Monster. After the monsters failure, the gang comes before the third gate, which is opened using the conquistadors helmet. The gate then releases water trapped behind and turns into a boat, allowing Scooby and the gang to escape and become stranded at sea. After learning that the next gate is below the water, the gang comes upon the final gate, which is opened using the flintlock. The gang enters the dimension, which is teeming with lava, and come upon the crystal sarcophagus and cursed treasure, realizing that they are beneath Crystal Cove. The Evil Entity sealed within tries to manipulate the gang into opening the sarcophagus to free it, but the gang realizes the words the being is speaking arent true. Suddenly, Pericles and the original Mystery Incorporated arrive and Pericles opens the sarcophagus, releasing the Evil Entity.