Idiot Ball: A trio of construction workers open a canister with a radiation symbol on the front after hearing something inside snarling.
Worker 1: I think there's something in there. What should we do?
Worker 2: Well, it's pretty clear, isn't it? Those are radioactive symbols, meaning what's ever inside is dangerous... meaning we need to open it right away. *shrugs* Don't want what's ever in there to mess up our schedule.
Fred also qualifies in the episode "In the Fear of the Phantom" because instead of saving Daphne, he takes a look at the trap to see where it went wrong.
Professor Pericles, despite being a parrot, bears a slight resemblance to his voice actor Udo Kier, especially the forehead.
Horatio Kharon resembles his actor, Michael J. Anderson, furthering the fact that he's a recreation of a particular Twin Peaks character.
Mayor Jones resembles a slightly younger version of Gary Cole except with black hair (and a Skunk Stripe). The first episode also features an incidental voiced by him that resembles him a lot more than Mayor Jones does.
In Medias Res: "Howl of the Fright Hound" begins at the climatic action.
Indy Escape: Episode 22. A rolling idol head nearly runs over a Damsel in Distress. Subverted because she set up the whole fake temple and knew what to expect, and her leg was not injured as she pretended.
Innocuously Important Episode: Episode 2 of Season 1, "The Creeping Creatures", was more or less a self-contained episode, not really related to the mystery of Crystal Cove. "Theater Of The Doomed", however, has the ghost of Friar Gabriello repeat the words of the Signs of Disrepair ("The Dog Dies") from that episode.
Insane Troll Logic: Episode 20. Ernesto believes that it's only logical to fund his grassroots activism via harmful oil drilling. In his defense, the Nibiru Entity warps the minds of just about everyone in the area. "We have to destroy the environment to save it!"
In Spite of a Nail: The altered timeline at the end of the series has a lot of examples. Notably, Fred still got the name "Fred" despite him presumably having been named after his fake father, who in this timeline never kidnapped him and raised him.
Irony: Scooby and Shaggy, the scaredy cats of the team, love to watch horror movies.
And not just any horror movies; they're known to watch a marathon of Vincent Price's horror movies (More than 400 but less than 500 no less) whenever the one week marathon passes by.
Jaw Drop: Done in the series finale with Shaggy and Scooby once they see a commercial in the alternate timeline for Ricky Owens and Cassidy Williams company, with Professor Pericles as their non-evil sponsor.
Jetpack: Both of the Kung Fu wizards who turned Crystal Cove into a battle ground in episode 18 had jet-packs in their costumes enabling them to fly.
Karma Houdini: The Cicada Monster's main motivation was to get back at the company for putting LANDFILL WASTE in their snacks! And it seems like everyone is A-Ok with this!
Subverted. Several episodes later, it's revealed they often get sued for their products and most of Mystery Inc. consider them terrible.
Justified later when it is revealed they have Corporate Diplomacy (basically they are their own country) and therefore cannot be sued.
The Killer Was Left-Handed: In "Web of the Dreamweaver", Velma realises that the Dreamweaver holds his orb in his off-hand. In the original illustration, the Dreamweaver held the orb in his left hand. However, the Dreamweaver now attacking the town holds the orb in his right, meaning he is a leftie.
Knight of Cerebus: Mayor Jones, whose true nature being revealed makes the already dark first season a lot darker in hindsight. Professor Pericles also counts, as whenever he's involved in an episode, it's a much more serious story, particularly when he gets directly involved in the second season, having evolved to become the Big Bad.
Those two completely pale when things begin coming to light regarding the true Knight of Cerebus of the series: the Evil Entity, which has been manipulating people for centuries to ensure its' release so it can devour all of reality. Things get the darkest they've ever been for the franchise when the plot begins building towards his release, and when it does get free, all hell breaks loose and you see exactly why he is theUltimate Evil.
Lava is Boiling Kool-Aid: Dead Justice's backstory has him chasing his nemesis into a volcano, then sticking his arm out from underneath just to handcuff him.
Laugh Track: Used only once, after the final line of the series.
Lawyer-Friendly Cameo: In the episode 'In Fear of the Phantom', the establishing shot of the concert hall the Hex Girls are playing at in the opening scene is a near identical copy to the exterior of the former Goth and Club Kid venue called Limelight NYC.
It's made even worse when he states that Mystery Inc. is dead; basically he's giving up everything he had right then to find his past. Can't really blame him since the past 17 years of his life have been a lie.
Let's Just Be Friends: Episode 22 has Velma give Shaggy the 'I don't feel the same way about you I used to' speech at the end of the episode; it's an ache that even pizza can't cure. But then Shaggy says 'Well, let's see if it can!' and goes back to his chipper self.
And once Velma spilled the beans about Angel in episode 25, and Shaggy being sent to military school, who knows if they ARE going to still be friends?
In episode 48, Shaggy questions whether or not the gang are supposed to be friends after the revelations from the Sitting Room realm.
Episode 52 has the evil Annunaki telling the gang that he was responsible for forging their friendship. They tell him he's lying, and this is cemented when the Nibiru Entity that consumed Professor Pericles feels pain when it tries to attack Scooby and the gang.
Let's Split Up, Gang!: Perhaps taken literally on episode 11. At the start, Daphne and Velma split up from the boys and Scooby. Their rejoining to the rest of the mystery is edgy at best. The end has them all going separate ways being watched by Mister E's assistant from episode 6.
Love at First Sight: The Orc asks this to Velma after she fixes one of their motorcycles. Velma, being the Deadpan Snarker that she is, blatantly tells him that she does not find him attractive.
Lovecraft Lite: The whole story arc, but special mention goes to the the evil entity. It's a Parrothulhu, as it looks like a cross between Professor Pericles, parrot and evilest character around, and a floating squid.
Magic Plastic Surgery: In "The Man in the Mirror", Brad and Judy have plastic surgery to turn themselves into doubles of Fred and an older version of Daphne.
Magic Skirt: In episode 18. The White Wizard carries Mai Le off by her feet, rendering her upside down, but her skirt doesn't fall over. And again later after Mai Le gets hung upside down in the snare set on the Blake yacht (which was disguised as Mai Le's escape vessel).
Averted in the Man-Crab episode when Velma visibly tries to keep her skirt down after being flung into the air by the Crab.
Makeover Montage: Daphne undergoes one in "In Fear of the Phantom" when she instructs the Hex Girls to "turn her into a rock star."
May Contain Evil: In "When the Cicada Calls", Destructdo is making snack foods that contain toxic waste landfill.
Meaningful Name: Possibly Professor Pericles. The Greek general/politician he's named after was supposed to have a slightly deformed head. Professor Pericles has a greatly inflated head, and an evil scar.
Porto, the donkey as well. "Porto" in Spanish means "to carry", and that's what a donkey does, being a beast of burden and all.
Mega-Corp: Destroido, the company run by Mr. E, which seems to exist solely to ruin the environment and create dangerous products. Also, according to Sheriff Stone, it is its own sovereign country, thus preventing him from arresting anyone involved in it.
Meta Origin: In "Heart of Evil", we learn that Blue Falcon and Dynomutt were originally a security guard and a guard dog (respectively) at the facilities of Quest Labs, and that Dynomutt got his robotic enhancements as a life-saving measure from Dr. Benton Quest after he nearly died defending the lab from Dr. Napoleon Zin. Though never outright stated, it's also heavily implied that Blue Falcon's gadgets were originally Quest Labs hardware.
Metronomic Man Mashing: In Episode 14, Captain Caveman snaps Jabberjaw out of a panic attack by picking him up by the tail and smashing him back and forth between two banks of lockers.
Missing Mom: In Episode 23, Scooby accidentally knocks a photo off Fred's mantel; his admiring the pretty woman in photo was cut short when Shaggy told him that that's Fred's mom who left town when Fred was very young; Scooby apologizes for being out of line and Freddy waves it off with a sad smile and talking about how he one day hopes to tell her in person that she is pretty.
So pretty that she came out of a magazine! Fred's parents are Brad and Judy from the original Mystery Inc; the Mayor took their son away and 'promised' the parents he'd protect him!
Mix-and-Match Critters: The Horrible Herd (part-cow, part-bee, part-piranha). Plus many more among the mutated abominations in Destroido's lab; such as a cat with human hands and some weird parrot/cat-looking creatures.
My Friends... and Zoidberg: Daphne's father delivers one when he is hosting a dinner for a visiting Chinese delegate in "The Dragon's Secret":
Nominated as a Prank: The motive of the antagonist of "Where Walks Aphrodite", Amanda Smythe, was getting revenge on the citizens of Crystal Cove for electing her as prom queen in high school as a joke and then humiliating her by pulling a monster mask over her head when she was not as attractive as she is today. While Velma points out that Amanda is now considered beautiful, she responds by saying despite that fact being true, the scars from that incident ran deep.
Nonuniform Uniform: In episode 9 Fred gets the gang team uniforms that make them look like a 70s Japanese supergroup. They're all similar white jumpsuits except that the color of the trim, piping, and ascot of each corresponds to a color of their previous outfits. It only lasts the one episode.
Daphne recalls how her dad was once found naked gnawing on a soup can when her mom was out of town.
In another episode Daphne talks about how every time her mother would sleep in their backyard treehouse, her family brings in a doctor or someone with authority to "work things out." Then they lock her away for a few months. In another, they have it to where Daphne mentions they used to have a lot of Faberge eggs, but she kept trying to boil them.
In episode 25, she mentions how one of her older sisters trained chickens to spell out her name as part of being engaged.
No Place for Me There: In the new reality created by defeating the Entity, Crystal Cove is built on beaches and sunshine, where people have a happy ending and all lost to the entity live again. However, such a place is without mysteries, and thus to satisfy their eternal craze for Mysteries, the gang leaves town for Myscatonic University and a whole host of mysteries that would follow along the way. Crystal Cove is a town they don't belong in anymore.
No-Sell: In the episode "Dance of the Undead", both Shaggy and Scooby prove completely immune to Rude Boy and the Ska-Tastics' hypnotic music, Scooby because music is "just noise" to dogs, and Shaggy because he's tone deaf.
Not a Date: In episode 35 Sheriff Stone and Mayor Nettles insist that their obvious dates are stakeouts.
Official Couple: Velma and Shaggy are dating, but Shaggy does not want to be public about it. As of episode 10 the relationship seems to have been scuttled. Fred and Daphne date and as the show progresses they get engaged and, at the end of the first season, they split up as Fred goes to find his real parents.
As of the season 2 premiere, Fred and Daphne has sunk. Daphne has moved on in her life away from Fred and mysteries, and Fred just needs a big hug right now.
Perhaps not. Since then, Daphne has rejoined the gang after they rescued her from the Crybaby Clown, who turned out to be her new boyfriend, though she hasn't yet decided whether to take Fred back or not.
It looks as if Mayor Nettles and Sheriff Stone are becoming an item now. This exchange after they wrap up what caused the destruction of Cassidy's radio station:
Mayor Nettles: Van Ghoul, here we come! Sheriff Stone: (casually) I'll get my smoker.
Oh, Crap!: In Episode 39, the old Mystery, Inc gets this when they finally get the disk pieces Freddy was hiding. The entire episode was a trap set by Freddy, whom they didn't think knew of their plans or was smart enough to trick them. He planted fake disks to be stolen while they stole Prof. Pericles' pieces, and they left a video disc in place of the pieces to explain everything.
In the Series Finale, the Nibiru Entity gets a satisfying one when he realizes the gang just launched an attack that's going to destroy the crystal sarcophagus, and him with it.
Out-Gambitted: The previous Mystery Inc. in 39 thought they'd gotten the Planispheric Disk pieces Mystery Inc. had, only to find out the pieces they'd stolen were fakes and Mystery Inc. was behind the Monster of the Week in their own successful plan to steal the pieces they had.
The gang's parents seem to put their happiness before their kids. Velma's mom (as shown in a picture) cares a lot more about her horses than her own daughter, Shaggy's parents think of him as an embarrassment, Fred's dad was thrilled at the idea of his son dying at the hands of the cicada monster, and Daphne's mother told her right to her face that sometimes she wishes they had a boy instead.
ALL the parents of Crystal Cove fit in this trope. When their children are "spookified", they abandon them!
Mayor Jones just has to be the worst out of them. For starters, he's not Fred's real dad. Though Fred's real father and mother end up topping him once they show up and get corrupted by the curse too.
The Picture Came with the Frame: It is revealed in Episode 26 that the picture of Fred's Missing Mom is a magazine photo. The Mayor isn't even his real father. His parents are Brad and Judy from the original Mystery Inc.
Police Are Useless: In Season 1, Sheriff Bronson Stone outright refuses to investigate any of the monsters claiming it is not his job. He only shows up to arrest the culprits while often complaining how the kids should not have gotten involved. He and the rest of the police force are a bit better in season 2 where they at least sometimes try to capture the monsters on their own though often failing.
Pseudo Crisis: In "The House of the Nightmare Witch", Shaggy is flung into a wall and knocked unconscious - a rare and dramatic event for Scooby Doo - and as the others gather around, with a frightened Scooby calling his name, we cut to the adverts... then return to have Shaggy instantly sit up, absolutely fine. This event is never mentioned again.
The Psycho Rangers: The original Mystery Incorporated are this in season two. The group falls apart quickly though, showing the consequences of distrust between friends, and teamwork being motivated by greed.
While Cassidy Williams is not Evil she does agree to work with the original Mystery Incorporated before betraying them, making her a token good teammate and counterpart to Velma. Velma struggles with feeling of love and betrayal for Shaggy, is distrusted by the current Mystery Incorporated for keeping secrets, and works for Mr. E behind her friends backs. Cassidy Williams struggles with feelings of love and betrayal for Ricky Owens, is distrusted by the original Mystery Incorporated for sharing secrets with the new Mystery Incorporated, and helps the current Mystery Incorporated survive the original Mystery Incorporateds attacks.
Public Hater, Private Fan: In "The Grasp of the Gnome", a man who says he hates pirates is shown to be dressing and acting like one when nobody's around.
Punctuated! For! Emphasis!: Used several times throughout the course of the series. One of the most notable examples might be Scooby-Doo at the end of Episode 51.
Scooby-Doo: Professor Pericles is going to regret the day he ever messed with Scooby. Dooby. Doo.
In Night on Haunted Mountain, the ghost of Fernando El Aguirre, the captain of the conquistadors, appears in the wreckage of his ship, whispers "Nibiru..." and then turns to bone and fades away laughing evilly.
In The Midnight Zone, Abigail Gluck's desiccated corpse whispers "Nibiru..." after Mystery Inc. discovers it.
Episode 41, the friar's ghost really was trying to warn them. And from the looks of things, the overall mystery of the disk, might actually be supernatural too.
Velma has a Heroic BSoD in episode 48 in regards to this as she's normally skeptical about the supernatural, and her trust of logic and facts in helping to solving the gang's cases had failed her.
Reality Ensues: Episode 33 when Sheriff. Stone tells Velma and Scooby about all the unlawful arrest charges against him from the gang's incorrect assumption of who was behind the monster of the week. When Stone finally thinks he's got a legit tag, the perp (Count Evallo) claims diplomatic immunity.
In episode 7, a Phantom chasing Shaggy and Scooby leads to the classic Scooby-Dooby Doors bit. The Phantom gets fed up with it and just lights the place on fire.
A company that makes something that people don't need to replace or buy more than one of isn't going to remain successful, as Rung Ladderton will admit.
Reasonable Authority Figure: Mayor Nettles in season two who, unlike the previous mayor and most of the adults in general, is generally supportive of Mystery Inc.'s actions. In fact she actively worked to get the group back together in the season two premiere.
Redemption Equals Death: In Episode 17: Danny Darrow, the last survivor of the Darrow family, had booby-trapped his mansion in order to keep hold of a clue to the Haunted Treasure. Upon realizing that he'd wasted his life, he told the gang to take it and escape from the collapsing dwelling. His last words were "I hope it brings you more happiness than it ever did me."
Episode 37 starts with the gang still not trusting Angel/Cassidy. At the climax, after Professor Pericles sets off explosions destroying the underwater city, Cassidy stays behind to unhook the claw holding the Moby Dick submarine tail so the gang can escape. Everyone learns that Cassidy did not survive when Scooby (the seal) finds her diving helmet, shattered.
Episode 52 has Hot Dog Water holding Pericles in check so the gang can enter the gateway towards the cursed treasure, but she gets tripped up by Brad and Judy. Pericles' robots take aim at her, and moments later as the gang cross a bridge, the clatter of gunfire sounds in the distance. Scooby turns his head back and whimpers, and Velma sadly says, "Just keep going, Scooby."
Same episode: Mr. E/Ricky, who had already rebelled against Pericles, staves off one of the robots so the kids can destroy the entity but he is consumed by it seconds later.
Thankfully, thanks to the gang destroying Nibiru, the timeline was re-written and Cassidy, Ricky and Marcy are all now quite alive.
Refuge in Audacity: In the first episode, Fred opts to steal one of the bodies after the Sheriff won't listen to him.
Relationship Reveal: The show decides to stop holding back, taking the long implied fanon tease between Fred and Daphne and less-teased-fanon thing between Shaggy and Velma and canonizing them in the show, in about as blatant a way as they could get away with.
Remember the New Guy?: A character that was not seen until an episode acts like they have been well known. Though expect this character being the bad guy.
Ret-Gone: After defeating the Nibiru entity, the timeline collapses to create one where he never existed, and any trace of his existence has vanished with him, such as his negative influence on the people of Crystal Cove's lives, creating a much Lighter and Softer world.
Retraux: In Mystery Solvers Club State Finals, Mystery Inc. is shown using their old designs (eg. Velma without hair bows) and a subdued palette to give it a retro feel reminiscent of the original 1960's cartoon.
Retro Universe: Inspired by Scooby-Doo, Where Are You? and the 1960s, with 21st century tech and snark. Which some have decided to dub "Cyber-Funk."
The Reveal: in episode 46, we learn from a possessed Nova that Scooby-Doo, Professor Pericles, and other intelligent/talking animals like them are descendants of the animal hosts of Anunnaki, beings from another dimension with no physical form in ours, who come to Earth when Nibiru, revealed to be the time when the worlds are closest, occurs. While some have helped humanity through the ages, the one sealed in the crystal coffin is pure evil, and must not be released.
Rhymes on a Dime: The Phantom and the Freak of Crystal Cove. Dark Lilith, as well.
Rule of Funny: Mystery Solvers Club State Finals is aired at a point in the series in which no confirmed supernatural phenomenon had been witnessed other than talking animals. Despite this, no one questions The Funky Phantom being a ghost, Speed Buggy being an animated vehicle, or Captain Caveman, and Jabber Jaw casually mentions that he's a time-traveler (likely also Captain Caveman's reason for being there, but never stated). Eventually turns out to be All Just a Dream.
Runaway Train: Played straight near the end of "The Wild Brood", complete with knocked-out engineer, the brakes failing, destroyed bridge and the locomotive completely demolished in an explosion.