In the opener, the amateur sleuths travel to a mountain resort to watch a snowboarding competition and end up investigating rumors of a snow creature that is attacking the participants. Olympic snowboard medalist Chris Klug provides the voice for his animated alter ego.
The gang must stop a shape-shifting alien before NASA's shuttle mission is aborted.
Daphne's uncle sends the gang to Costa Rica for the opening of a museum exhibit on dinosaurs. When our heroes meet archeologist Melbourne O'Reilly, he reveals the legend of a dinosaur-spirit who's supposed to get revenge on anyone who disturbs these bones. So when the gang sits down to enjoy a new 3-D dino-film in the museum's theatre, it's not that surprising when the dinosaur jumps off the screen -- and into the audience. It's up to the gang to figure out who's really "behind this devastating dinosaur disaster."
Ghosts re-enact a duel every night in a New Orleans graveyard.
When the Mystery Machine comes to life and begins driving by itself, the gang tries to find the clues.... Which leads them to The Mystery Kids, the band who formerly owned the Mystery Machine.
The gang goes to Las Vegas to meet teen pop singer Lindsay Pagano, but they soon end up trying to uncover the mystery of a deceased magician who's haunting the theatre that Lindsay's performing at.
The crew goes to a roller coaster park because of Scooby and Shaggy having their new ride built there and they run into some ride mischief with a ghost called The Roller Ghoster and it seems to break rides around the park.
When the gang travels of the safari, They discover the animals changing to a yellow color and doing strange things. They have to solve the mystery or else that stuff might happen to Scooby.
The gang goes on a trip to the islands where they are gonna vacation when they encounter a sea serpent known as Motoshondu.
The gang investigate on this mystery where activated toys are taking over the toy store. They suspect a really interested fanatic is involved with the case. When he actually comes clean, the gang thought they were right all along. But they weren't.
A purple phantom starts threatening the production of "Spy Me A River" and the gang set out to find the villain.
While visiting Italy the gang battles a zombie gladiator who appears to be responsible for causing volcano erruptions.
The ghost of an old baseball player named Cab Craig starts haunting the baseball stadium. Scooby and the gang have to find out who it is.
The gang investigates some mysterious disappearances of teenagers on Lovers Lane while Shaggy and Scooby catch up with old girlfriends. But the culprits behind it all turn out to be the gang themselves!
Shaggy & Scooby are on the run! After Velma wins a contest for the best invention (a robotic dog) the gang gets to travel to Tokyo, Japan. When a mystical person zaps a pizza with a growing spell and Shaggy eats it! Shaggy starts to grow whenever he goes to sleep and he starts eating everything in sight. Now the gang are running around Tokyo trying to get away from the police who want to put Shaggy in jail.
While in Egypt on an archeological dig with Melbourne O'Reilly, the gang encounters Pharaoh Scamses the 15th, a mummy who has a knack of turning tourists into his zombie minions. So the gang sets out to solve the mystery - that is, until Fred, Daphne and Velma get turned into zombies too!
Thanks to Freddy, the gang enters a 24 hour off road race, only to deal with crazy drivers, a giant worm named El Gusanu, and the cult that honors the worm.
The gang visits a state fair in order to see all the inventions "of the future." But they get more than they bargained for when they set their sights on a "House of the Future," which is allegedly haunted. Things seem pretty normal within... until Daphne mysteriously vanishes. Is it two prankster kids, a reality TV personality, the creator of the gadgets or the high-tech house of horrors itself that's responsible for the strange goings-on?
The Scooby gang travels to an old Transylvanian castle on a rainy night to watch the shoot of the Hex Girls new music video ''Wanna Wed, But I Fled'', but they find out that the band is breaking up, since there's a vampire on the loose. Fred decided go straight to trapping the vampire. They do so, only to discover there's another vampire lurking around, so they go through the whole thing all over again to reveal a surprise twist to this mystery.
In this episode Scooby has to choose between going to a museam or a dog show. He chooses the dog show. While at the dog show they find that a mysterious cat creature is haunting the show. The cat creature appears during the show and while Fred, Daphne, Shaggy and Velma go fight the creature, Scooby protects the 6 pups and the mother. But then dognappers reach them and kidsnapped Scooby and the six pups!
During a visit to San Francisco for the Grind Games, a world famous skateboarding competition, Scooby and the gang discover a monster known as the San Franpsycho. WHO is stalking the skaters?
Traveling through a Canadian ghost town, Scooby and the gang encounter the rock group, Simple Plan. As members of SP are kidnapped one by one by the Inivisible Madman, everyone one of the locals has an aliby for not being the Invisble Madman. Who is the Invisible Madman that is haunting them?
There's an Ooze Monster haunting the Scooby Snacks factory and Scooby and the gang have to stop it.
The gang visits a Renaissance Fair. Velma is thrilled to see the star of her favorite T.V. show that had been cancelled many years before at the fair. When a dragon begins haunting the festival, the gang is shocked. But when Velma gets kidnapped, Fred, Daphne, Shaggy, & Scooby rush to save her before it's too late.
Scooby and Shaggy befriend a penguin while working at a zoo. When they (as well as Velma, Daphne, & Fred) are invited to join him on a trip back to his home, Antarctica, they find that an ice ghost is haunting the way station there. He even has pushed the head scientist there into the ice. Velma is baffled by the increasing amount of suspects but eventually figures out who the villain is.
A giant Wakumi bird is stealing sculptures that are too be put in a museum.
Scooby and the gang find a medallion while in Greece and are pursued by a centaur who's after the medallion.
The gang goes to Banning Junction to visit Velma's family for Halloween, but they meet the ghostly robots who try to ruin the festivities. Hopefully they can save the town before the ghost of Hank Banning shows up. Notes: This is the only What's New, Scooby-Doo? episode to contain a laugh track (the entire episode is somewhat of a homage to the original series - hence the laugh track).
The ghost of a Lighthouse Keeper is haunting an old lighthouse and causing terror to ships out on the water. Who is behind the Creepy Keeper?
The gang travels to a western town where the majority of the residents are robots.
A weird wrestler known as Titanic Twist with two arms on one side is terrorizing wresting matches.
The gang is in Paris to see Daphne's cousin Dannika win "Model of the Year", but they discover she has been abducted when a Gargoyle from Notre Dame cathedral has come to life. Now the kids must find her by searching the Paris catacombs, the sewers, and the cathedral before the fashion expo starts.
The gang goes to visit the Secret Six Puppies, but soon discover something terrible. A mysterious Deamon Farmer haunts their farmhouse that was built over an ancient graveyard, and wants the puppies gone. The gang stays to help, when all the farm workers have quit.
In Russia, the gang discovers the Frozen Fiend, a ghoul creature that stolen the Emperor Cup, which would be give the Internation Hockey Tourmants's winner?
The Internation Putt-Putt Tourment is treated by its own 18-th hole--and MONSTER-style Clown--but that is good and bad news for Mystery Inc. on the screen. The bad news, the genius of the gang, Velma, has a clown phobia--but good news is that Norville "Shaggy" Rogers is ACTING BRAVE! Holy reservals, Scooby-Doo! Can the gang solve the mystery and get the regular Velma and Shaggy back?
A monster known at The Toxic Terror is attacking the favorite camping ground of Shaggy, Scooby, and 3 kids.
Mystery Inc gets involved in a mystery featuring a giant dragon, a wig-out ex-worker, a stolen candy ring from Lui-Won Toy Stores, an insane cop, and mutant giant toys. Can Velma figure out who's behind this insane mystery?
The Mystery Kids head for a NASCAR-like championship race where mayhem is taking place on the racetracks.
The gang goes to visit the Sacred Six (originally seen in Homeward Hound and Farmed and Dangerous) when they learn that an evildoer called Gold Paw is turning people into gold in order to steal gold. When one of the Sacred Six is gold-ified, the Mystery, Inc. gang needs to solve this case before the other five suffer the same fate!
A creature made of the coral reef attacks a sand castle competition in Australia. People start disappearing through sand.
The gang visits a video game convention to play the video games, but the cute Osomon creatures that were the highlight of the show turn into monsters.
Scooby and his pals arrive in a town where Christmas is not celebrated because a headless snowman terrorizes the residents, so the amateur sleuths set out to solve the mystery.
