In an episode of What's New, Scooby-Doo?, when Daphne meets someone hired to impersonate her, she complains she is being played by an extra and asks whether Sarah Michelle Gellar was busy. Sarah Michelle Gellar of course played Daphne in the live action film.
In Chill Out, Scooby-Doo!, Shaggy (played by Casey Kasem) happens upon an abandoned radio house atop a mountain. He asks Scooby if he'd like to hear his "DJ impression". When Scooby says yes, Shaggy clears his throat and does an "impersonation" of...Casey Kasem.
One episode of Mystery Incorporated involved Shaggy and Scooby having dinner with Vincent Van Ghoul (an obvious Ink-Suit Actorexpy of Vincent Price, who had played him in The 13 Ghosts of Scooby-Doo but passed away not long after). Several of Van Ghoul's quirks seen in the episode were ones Price was known to have, including a love of gourmet cooking.
Adaptation Dye-Job: In "The Mystery Begins" and "Curse of the Lake Monster," the normally blond Fred is a brunet.
Bravo Dooby Doo, an extremely on-target spoof where Johnny Bravo crossed paths with Mystery Inc.
The Scooby-Doo Project, a series of interstitials from 1999 spoofing "The Blair Witch Project". Daphne even appeared as a member of the Hanna-Barbera tribe in Cartoon Network's "Staylongers" (spoof of "Survivor") interstitials.
A not-so-affectionate parody: "Ring-a-Ding, Where Are You?", one of the shows to which Mighty Mouse gets juxtaposed in the 1988 episode Don't Touch That Dial from his Bakshi-produced TV show.
Mighty Mouse: Gosh ... I feel my I.Q. dropping by the minute!
The first live-action movie probably fits this trope as well, being more a spoof of the franchise than a straight-up adaptation. Apparently the first draft of the movie was more obviously a parody, in the vein of the Brady Bunch movie, with more adult humor and straight-up mockery of the classic Scooby tropes. The final movie was a lot Lighter and Softer and family-friendly, but retained a notable parodic edge.
Amusement Park of Doom: Every incarnation has at least one of these. One of the earlier examples had a runaway robot mess with the controls. The Thirteen Ghosts of Scooby Doo, had one of the titular villains run one of these.
Animated Actors: In the 1979 prime-time special Scooby Goes Hollywood, Scooby and Shaggy get sick of their secondary roles in a formula-driven Saturday morning show, and attempt to sell a network executive on giving them a prime-time series of their own. (They pitch a number of pilot shows, all parodies of then-popular series, such as Charlie's Angels, Happy Days and The Love Boat.)
Scooby himself was suffering this by the mid-80s. He was seen walking on two legs all the time (it didn't help that his four legged design was not changed) and he was becoming somewhat less of a Speech-Impaired Animal. It seems to have been reversed beginning with A Pup Named Scooby-Doo where he became more of a quadruped again.
When Scooby runs in the early series, his legs don't follow a normal dog's running pattern. Each pair of legs go alternately in a circular motion. The only episode showing him running like a normal dog was "Decoy for a Dognapper," as he and the freed kidnapped dogs run after their captor.
Artistic License Religion: Witch's Ghost treats witches and Wicca as two separate Witch Species, meaning a) one character claims his ancestor was a Wiccan who was burned at the stake 300 years before the religion was founded (granted, said character was lying and she really was a witch), and b) one of the Hex Girls is "one-sixteenth Wiccan".
Bad Future: From The 13 Ghosts of Scooby-Doo, "It's a Wonderful Scoob." Without Scooby around, the world falls to the ghosts, Daphne is a broken slave to the Time-Slime ghost, Scrappy and Flim-Flam have become his loyal servants, and Shaggy is a lone rebel that has gone crazy, adamantly believing that Scooby will return and save them.
Balloon Belly: Shaggy and Scooby occasionally. Notable examples include their feast in The Witch's Ghost, in which they leave a diner almost unable to walk, their stomachs having gotten so huge; Mystery Incorporated puts a twist on this by depicting Scooby and Shaggy attempting to eat most of the food in Crystal Cove, and become grotesquely obese, initially unable to walk.
Beautiful All Along: Rarely, Velma will lose the frumpy outfit and thick glasses to reveal she actually can be quite pretty. She's also pretty well-endowed, even though she downplays it with her oversized orange sweater.
Scooby-Doo in Arabian Nights: Haman, dressed as the Prince in disguise, enjoys a dancer's movements in the royal palace, all before Aliyah-Din interrupts the session in order to present herself for marriage.
In the story The Spooky Spook House, which was published in Archie Comics #8, the gang finds a mystery at an amusement park, and Daphne becomes a dancer to attract people to Scrappy Doo's ballgame stand.
Velma and Daphne disguise themselves as belly dancers in the What's New, Scooby-Doo? episode, "Mummy Scares Best". Scooby even joins in on the action in an attempt to distract a group of hypnotized tourists from harming Velma and Daphne.
Big Damn Heroes: In the 13 Ghosts of Scooby Doo episode, "It's A Wonderful Scoob," Scooby Doo takes out the villain, destroys his lair, and boot Bogle and Weerd to the curb. In seconds. And without a trace of fear (he was actually pretty angry).
Big Damn Movie: The supernatural will inevitably turn out to be real in a Scooby-Doo movie, but the basic formula is usually the same.
Where's My Mummy? had a "Scooby-Doo" Hoax, albeit a very elaborate one put on by Velma, an archaeologist, and an Ardeth Bay expy. Velma would explain that she didn't let the others in on the hoax because it was dangerous and she didn't want anybody to get hurt.
Monsters Unleashed, Legend of the Vampire and Monster of Mexico also all ended with a more conventional Scooby-Doo Hoax.
Halfway through, Curse of the Lake Monster looks like a "Scooby-Doo" Hoax, until the actual ghost of a witch takes Velma's body as a host and creates her minions of lake monsters. This is the second feature-length movie, animated or live, centering on Velma.
Big Eater: Shaggy, Scooby and occasionally Scrappy. If Fred wants to find the monster, Shaggy will volunteer to investigate the kitchen, and prepare a large snack for himself and Scooby — until the monster comes to interrupt the meal.
Big, Friendly Dog: Scooby is a full-grown Great Dane and has never been vicious to anything, ever. Unless you count sandwiches.
Big Shadow, Little Creature: An interesting variation occurs in "Mine Your Own Business," when the ghostly Miner '49ers runs for it when he sees and hears what appears to be a train approaching... only for it to really be Shaggy imitating a train horn and chugging, and Scooby going down the tracks with a flashlight and speaker Shaggy's train noises are coming out of.
Black Belt in Origami: In "Mystery Mask Mix-Up", Shaggy tries to bluff a Chinese ghost by saying, "I know judo, chop suey and Chinese checkers!"
Blind Without 'Em: Velma was always losing her glasses in the original series. (A common gag on the show: Whenever she loses her glasses, the Monster of the Week is the one who hands them back to her, and she doesn't realize how close he is until she puts them on.) Nicole Jaffe, the actress who originally played Velma, admitted in an interview that at the initial taping of the show, she accidentally dropped her glasses. She then exclaimed something the writers adapted into her catchphrase: "My glasses! I can't see without them!"
Bootstrapped Theme: "The New Scooby Doo Movies'" theme didn't originally take off - in fact, the show directly after it didn't reference it at all. But then the "Scooby and Scrappy Doo Show" used it, and from that point on it was the running theme of the series for ten years.
Broad Strokes: As per the company that created them, Scooby's history evolves this way. At times continuity is important and sometimes it's not.
Brooklyn Rage: In Scrappy's earliest appearances he had a definite Brooklyn accent, courtesy of Lennie Weinrib, to go along with his boisterous personality. Justified that he grew up in New York. This was abandoned when Don Messick became his voice actor.
Redbeard in "Go Away, Ghost Ship." He makes a second appearance in 1972's "The Ghostly Creep from the Deep," but in that story, he and his pirate crew are all ghost white and the voice is different (John Stephenson in "Ghost Ship," Lennie Weinrib in "Ghostly Creep").
One of the TV movies has a variant with a white stripe in his beard: Captain Skunkbeard.
Captain Obvious: Mystery Inc. will often point out things that are happening or just happened that should already be obvious to the viewer.
Catchphrase: Lampshaded in Scooby-Doo and the Samurai Sword, when the team finds out that the normal episode formula had turned into an Evil Plan, all of the characters say their catchphrases, ending with Fred:
Fred: "Um, uh...aw, darn it, I still don't have a catchphrase!"note He has said, "Creepers!" on occasion.
From The 13 Ghosts of Scooby-Doo, Flim-Flam was selling a concoction known as "Lots of Luck Joy Juice" when we first see him. One of the ingredients was Wolfsbane, and a splash of it was enough to cure the werewolf villagers that put the gang into a corner.
In "Happy Birthday Scooby-Doo" Scrappy is shown making rubber (Which Scooby mistook for cake) Later Scooby is falling, and later it's used when Scrappy uses it to help the rest of Mystery Inc. save Scooby's life.
Cobweb of Disuse: In "What the Hex is Going On?", the old Kingston Mansion has these in the background (corners, connecting furniture to walls). Also present in the Vasquez Castle (notably on the portrait) in "Hassle in the Castle".
Cold Open: Ever since the series' earliest incarnations, episodes typically begin by introducing the setting and a couple supporting characters (or innocent bystanders) who then get attacked by the Monster of the Week, before cutting the gang arriving on the scene. Since What's New, Scooby-Doo?, these scenes have consistently been moved to before the opening credits.
Combat Pragmatist: Surprisingly enough, Scrappy was this occasionally, taking advantage of his strength and small size to knock his opponent off balance, and "The Night Ghoul Of Wonderworld" and "The Ghoul, The Bat, and The Ugly" both involve him tricking the villain into a spot (A clock gear and a revolving door respectively) where he could spin them dizzy and incapacitate them.
Scooby has been in comic books since December 1969, published by Gold Key/Western Publishing, Charlton, Marvel, Harvey (reprints from Charlton), Archie Comics and the current publisher DC Comics. The first ten issues of the Gold Key run of Scooby Doo comics featured either truncated or very loose adaptations of TV episodes. Two episodes were made into comic stories twice: "A Clue For Scooby Doo" (Gold Key, DC) and "Spooky Space Kook" (Gold Key, Archie Comics). The first Marvel Comics issue featured a truncated adaptation of the 1976 episode "The Ghost Of The Bad Humor Man."
Zig-zagged: The pilot episode of Scooby & Scrappy-Doo ("The Scarab Lives!") was loosely based on the first story of Scooby-Doo Mystery Comics #24 (Gold Key/April 1974, "Mark Of The Blue Scarab").
Starting in October 2010, the DC comic began billing itself as Scooby Doo, Where Are You!, the first time the comic has been billed as such since October 1976.
Gold Key, known for taking continuity liberties, started making the gang ghost breakers for hire starting with issue #14. If this continuity is to be followed as any sort of canon, then issue #21 has the gang with the following Zodiac signs: Scooby—Aries, Fred—Pisces, Shaggy—Leo, Velma—Virgo, Daphne—Gemini. Charlton's stories are best left undiscussed.
Comic-Book Time: The gang were all teenagers and Scooby was a fully grown great dane with the franchise launched in 1969. By the time of, say, Scooby-Doo! and the Reluctant Werewolf in 1988, Shaggy should be a middle aged man and Scooby should be long dead, but neither has aged a day. Scooby-Doo on Zombie Island offered the first indication that time was passing at all for the characters, with everyone appearing a few years older after the Time Skip that follows the prologue, but said prologue still shows everyone at their original ages well into the mid-1990s. In two decades of subsequent direct-to-video films, they've never aged again. Even if you don't accept the gang already having Scooby when they were kids into the timeline, he's still a very old dog.
The monster in the first movie is The Scrappy himself, wanting revenge for the team dumping him at the start of the movie. In the second film, most of the monsters are classic 'Doo bad guys, as is the real villain.
The Mysteries Incorporated series starts off with museum exhibits of several of the same villains the second film mentioned. Which can be somewhat confusing to people who watched the premiere, which was preceded by the second film.
A memorable one (That's Snow Ghost) had Velma tied to a log heading for a large circular saw.
Lampshaded by Shaggy in "Don't Fool With a Phantom" as he and Scooby are placed on one by the Wax Phantom:
Shaggy: "Not the old ride-on-the-conveyor-belt-into-the-wax routine. Oh, no. Like, that went out with the silent movies, Phantom, old pal."
Conviction by Contradiction: One What's New episode has the culprits turn out to be a man and woman pretending to be Sickeningly Sweethearts to secretly pass information to each other. After the unmasking, Velma says that the first thing that tipped her off was they were too lovey-dovey to be newlyweds as they claimed.
Crazy-Prepared: In What's New, Scooby-Doo?, Fred has made enough "special modifications" to the Mystery Machine to put Han Solo to shame, including modifying it to transform into a submarine and fitting it with a roof airbag which conveniently enables Shaggy to save Velma when she falls off a highrise movie set in "Lights, Camera, Mayhem". The submarine turned out to be a clue that The Game Never Stopped.
In a mix, Hanna-Barbera had already made a Laurel and Hardy cartoon in the 60s, but it was drawn more like the The Huckleberry Hound Show era. In this episode, they are drawn more in the 70s Scooby style, but with the same voice actors.
Besides these the show features other celebrity guest stars including:
Don Knotts was in an episode parodying 'The Andy Griffith Show'' and an episode where he was a goofy Barney Fife like detective.
Not to mention Don Adams of Get Smart playing an exterminator in the house of a parody Lon Chaney.
Don't forget to see the faboulous Dick Van Dyke and Hurry hurry hurry!
Issue #9 of the Marvel Scooby-Doo comic book had a guest appearance by Captain Caveman and the Teen Angels. Dynomutt and Blue Falcon join the gang in a story in the giant special Yogi Bear's Easter Parade. The two superheroes are also main components of the DVD feature Scooby Doo: Mask of the Blue Falcon.
The CW series Supernatural goes animated in the 3/29/18 episode and crosses over with Scooby Doo.
In one episode with a clown that hypnotizes people (Bedlam In The Big Top), Shaggy and Scooby remember what the clown did, so when he tries it on them again, they use mirrors to deflect the spell back at him, thus incapacitating him. That and when they pilot a bulldozer to tackle Steve in Alien Invaders.
There's the mini-golf episode from "What's New, Scooby-Doo?" where Shaggy took the reins to try to solve the mystery for the majority of the episode. In that same episode ("A Terrifying Round With A Menacing Metallic Clown"), Velma goes off cowering with Scooby as her secret fear comes to the surface—she's frightened of clowns.
The comic book adaptation of "Bedlam In The Big Top" (Gold Key #9, Dec. 1971, retitled "The Phantom Clown") retroactively subverts this—Velma is the hero of the story as she hypnotizes the clown with his own gold coin.
Shaggy and Scooby-Doo are secretly ninjas. In situations where they can't be the whimpering cowards, they pull amazing feats. In Scooby-Doo in Where's My Mummy?, they leapt from falling platform to falling platform to keep from plummeting to their dooms. Scooby-Doo and the Samurai Sword also counts towards this.
Scooby himself is a full grown great dane, one of the largest breeds of dog in the world.
Cute Monster Girl: In Ghoul School, Shaggy, Scooby and Scrappy become gym teachers for a bunch of them.
Cut Short: Scooby-Doo and his friends never did catch all 13 ghosts from The 13 Ghosts of Scooby-Doo. Technically, only 11 ghosts were shown being caught at all - and no ghosts were captured in the pilot.
Scooby-Doo on Zombie Island and Scooby-Doo and the Witch's Ghost are the darkest of the animated films. Cartoon Network made an awesome promo for Scooby-Doo On Zombie Island when they aired it on their animated movie spot. It only used the most thrilling scenes and was set to climactic Ominous Latin Chanting (possibly O Fortuna). Never before did Scooby-Doo seem so intense.
Scooby-Doo! Mystery Incorporated, although not much. It's definitely not cynical, but the universe as a whole is a little less idealistic, and the jokes, characters and events are more mature.
Usually Shaggy after he makes a comment about the qualification that what they're chasing is a ghost.
Velma, of all people in the episode Scooby Doo Meets Dick Van Dyke as she, Fred and Dick see Daphne having fun on a bump-'em cart:
Velma: Hmph, Women. (realizes what she said) What am I saying?! I'm one of them!
Didn't Think This Through: Lampshaded by Daphne in ''Scooby Doo And The Beach Beastie," as she, Velma and Fred attempt to attack a giant water monster with lighted torches. The monster simply douses the torches with its fingers.
Distressed Damsel: In the two shows with The Three Stooges, scripter Norman Maurer seemed to like getting Velma in a nice mess. In Ghastly Ghost Town, a mysterious figure sends her down into the mine shaft, while in The Ghost of the Red Baron, she is sent airborne in a bi-plane she doesn't know how to operate.
Easily Forgiven: "What's New, Scooby-Doo?" occasionally had the culprit be let off the hook if they had arguably sympathetic reasons or if nobody got hurt, even if by their actions the monster would have very nearly killed someone. "Roller Ghoster Ride" is a good example of this, involving among other things Fred, Daphne and Velma almost getting diced up by a giant fan thanks to the monster's sabotage, along with tons of dangerous situations coming from sabotaging amusement park rides which would've ended up fatal if not for dumb luck or quick thinking, with no real consequences for the culprit.
Edible Ammunition: The gang is investigating a haunted candy factory (could be worse places to work, right?) when the Green Globs locks Scooby, Shaggy, and the factory's owner, Cass Elliot, in a storeroom. Fortunately, Cass finds a mechanical jawbreaker dispenser, and fixes it to shoot jawbreakers at the door until they batter it down.
Either/Or Title: Several episodes throughout had unused Either-Or Titles. Among them:
Scooby-Doo Meets the Addams Family (Wednesday Is Missing)
Sandy Duncan's Jekyll and Hyde (Scooby Doo Meets Sandy Duncan)
Scooby-Doo Meets Laurel & Hardy (The Ghost of Bigfoot)
The Caped Crusader Caper (The Sighing Flute...er, Flying Suit)
Scooby-Doo Meets Jeannie (Mystery in Persia)
Scooby-Doo Meets Dick Van Dyke (The Haunted Carnival)
Who Was That Cat Creature I Saw You With Last Night? (Make a Beeline Away from That Feline)
In "Hassle In The Castle", Velma sees and verbally acknowledges that the Shaggy head protruding from half of a magician's saw-in-two box was a dummy head. Shaggy pops up from the other half and says "Somebody mention me?"
The death of the cat people in Scooby Doo on Zombie Island goes straight into Nightmare Fuel. Also the death of the former inhabitants. Being forced to go into a sea where alligators (or crocodiles?) just wait for their meal? Charming.
The entire gang suffer one at the end of The Scooby-Doo Project. The last we see of them is the monster coming towards them then the camera cutting out and the announcer telling us no trace of them was ever found.
In Scooby-Doo on Zombie Island, there are a few examples of this, with one zombie having his head ripped off and two getting cut in half.
The crossover with Supernatural takes the three main characters of that series and plops them into the cartoon world, winding up in the Scooby-Doo, Where Are You! episode "A Night Of Fright Is No Delight." The first victim, Cousin Simple, who ran from the mansion in the original episode, is found stabbed to death here. Also, Fred takes a shot to the nose from the ghost, causing it to bleed, and a tumble out a mansion window causes Shaggy to break his arm.
Fearless Fool: Zig-Zagged. Whenever a monster shows up, Scrappy almost always tries to fight it, with little to no effect. Several of these instances include real monsters, where if Scooby had not snatched him out of the way and ran, Scrappy would've been mince meat. However he has his competent moments such as "Gem Of A Case", where Scrappy hears Shaggy out after he's pulled back and there are times when his Scrappy traps seem completely capable to catching something (although Shaggy and Scooby get caught more often than the monsters). Definitely averted with the ending of "South Seas Scare", especially since it was a real monster: he throws a lava monster back into the volcano at the end of the short.
Shaggy: The Lancer: When the gang does split up, Shaggy leads one half. Shaggy (along with Scooby) often notices creepy things that Fred had missed. Shaggy is likes to sneak away with Scooby to eat a large snack.
Daphne's klutziness is turned up to eleven in Abracadabra-Doo.
In Mystery Incorporated, Fred becomes completely obsessed with making traps.
Scooby's cowardliness, during the first season.
When it comes to courage, both Scooby and Shaggy have been incredibly flanderized since the original series. The duo was always reluctant to go ghost-chasing (Daphne was also less enthusiastic about their adventures) but more recent incarnations makes this viewer wonder how the two function at all with the group.
Velma is normally a bright girl, but she becomes a bit inept (not of her own doing) when she loses her glasses. However, a particular bit of brain fart is puzzling. In "The Ghost Of The Red Baron," she is sent airborne in a bi-plane she has no control of, and she forgets the international distress radio call (followed by an atypical Daphne response):
Velma: Let's see, what was it? January? February? ...March? April? Mayday!! That's it!!
Daphne: That's Velma. What's she calling "mayday" for? Today's June 5th!
In What's New, Scooby Doo?, Velma became a bit more as snarky as she was smart, albeit her fear of clowns came suddenly to the surface. And in Scooby-Doo! Mystery Incorporated, she tacks on cynicism, her obsessiveness to Shaggy and her contempt (as of episode 10) of Scooby.
Food as Bribe: Shaggy and Scooby can be coaxed into doing anything for food, namely Scooby Snacks.
Foreshadowing: Zombie Island has several signs linking to the end of the mystery, including one in one of the chase sequences, where a Zombie gives Shaggy a vine to pull Scooby out, at first, it looks like just a gag involving the whole "Monster helps them to save themselves", but it foreshadows that the Zombies are not as evil as they're made out to be.
Fortune Teller: In the Where Are You episode "A Gaggle of Galloping Ghosts", the gang meets a Gypsy fortune teller who gives them dire warnings. She turns out to be the episode's villain in disguise.
Free-Range Children: The gang was originally designed to be high school age, and in the first series most of their adventures are implied to locally. With a few exceptions of a trip to China Town or Hawaii. As the series went on they became more of this even if thye didn't appear to have grown much older.
Friendly Scheming: A number of stories have the team actually stage a mystery in order to play a joke on one particular gang member.
In the Chupacabra-Cadabra story from the Scooby-Doo, Where Are You? DC Comics series, the gang arrives to a magic show in Mexico for Shaggy's birthday. A monster called Chupacabra appears, and the team members start disappearing one by one... eventually, it is revealed that it was all a pretext for Shaggy's surprise birthday party, and everyone, except Shaggy and Scooby, was in on it.
Likewise, in The Secret of Hotel Hush, the supernatural mystery turns out to be a pretext for Scooby's birthday party - this time, Shaggy was also in on it.
In Ghost in the Machina, Fred, Velma, and Daphne staged a monster mystery at Big Ralph's Car Wash as a way to get Scooby and Shaggy to take a bath.
In Clueless, the gang staged a fake kidnapping of Velma as a prelude to her surprise birthday party.
Unlucky Luck (Scooby Doo... Mystery Comics Gold Key issue #20, July 1973) had Velma staging a game to cure Shaggy and Scooby of being superstitious. She has Fred and Daphne plant rewards among bad luck elements, but it backfires: Shaggy and Scooby retrieve their luck talismans thinking that if they had all that bad luck, imagine what kind of good luck they'll have.
The Happy Birthday, Scooby-Doo episode of The New Scooby-Doo Mysteries starts like this: a ghoul at the TV station ZPOP turns out to be a ruse made up by the gang to lure Scooby-Doo to a surprise birthday TV show. However, an actual monster soon appears at ZPOP.
Functional Magic: The conclusion of Scooby Doo and the Goblin King. The Goblin King permits Shaggy and Scooby (the main heroes) to retain their memories of the events that transpired but he erases Fred's, Velma's and Daphne's memories. Shag and Scoob pull up in the van as their buddies' heads clear, not knowing what happened last:
Daphne: Shaggy! Scooby!
Velma: Where were you two all night?
Shaggy: (He and Scooby exchange knowing glances) Like, you wouldn't believe it if we told you!
G-Rated Drug: Scooby Snacks. Either that, or they're just a very convenient, cheap, salted-chip style appetizers whose demand is fueled by an unspoken drug, ie, marijuana.
Gadgeteer Genius: Velma arguably qualifies, at least in What's New, Scooby-Doo?. where she's capable of building (among other things) a robot dog with a remarkable number of functions and an MP3 player the size of a sugar cube (though the latter lacked earphones). In the same series Fred also at least comes close with his improbably sophisticated modifications to the Mystery Machine.
Particularly in the original series. No, the gang will never figure out or even guess that the monster is just a guy in a costume right away, no matter that the last few dozen monsters were all guys in costumes. They have to wait until the end of the episode.
Genre Savvy: The three principals from Supernatural enter the Scooby world where an actual ghost terrorizes the Beauregard Sanders mansion. They have to catch the ghost and at the same time maintain the Scooby-Doo status quo.
Genre Shift: Zombie Island transitioned from a straight Scooby-Doo story, to a supernatural horror mystery film.
Gesundheit: Pulled twice in "Ghastly Goals" when the Eshu's name is stated.
In A Scooby-Doo Halloween, Velma's cousin says "I'm 18, able to legally..." [looks at Fred] "...vote."
In Curse of the Lake Monster, Daphne's Uncle says "Well, it looks like I'll have to go back to my old life as a international playboy." Then again, that may have been an element that garnered the movie a TV-PG rating.
In Scooby-Doo on Zombie Island Shaggy and Scooby get jobs as customs officers. They were apparently supposed to be searching for contraband foods, and were subsequently fired for eating the contraband.
Daphne walks in on Velma floating in midair:
Daphne: Wow, a real case of levitation! (Velma floats even higher) This just gets better and better! Velma:(pulling her shirt to her thighs) Maybe from where you're standing!
"Blue Falcon" is United States military slang for "buddy fucker" (somebody who pursues his own interests at the expense of those who he's supposed to look out for).
In the ''Scooby Doo, Where Are You!" episode "Bedlam in the Big Top", there's the part where the Ghost Clown hypnotizes Daphne, which has some surprisingly disturbing underlying implications to it. First of all, while the Ghost Clown got Scooby and Shaggy during other parts of the episode because they wandered off from the rest of the group, Fred and Daphne were initially together when he got her. While he probably could have hypnotized both of them given how competent he was shown to be for a Monster of the Week villain, he instead locked Fred in a closet when he got the chance and went after Daphne specifically, which has to make one wonder if he had a thing for her. However, the worst of it comes from the fact that she is completely changed into that ballerina outfit when we see her on the unicycle in the next scene: did she change into it herself when she was in her trance... or did the Ghost Clown strip her down and dress her in it himself? Finally, this potential theory is only worsened at the end when we find out that the Ghost Clown's real identity was an older man named Harry the Hypnotist. Yeah...
In Scooby Doo! And The Beach Beastie, Scooby falls in love with a hotel guest's Pekingese, which naturally irks Shaggy. As the gang watches from a distance:
Daphne: There's nothing to worry about, Shaggy. He's not even sniffing her...(beat, then double take) he's sniffing her...
Growing Muscles Sequence: One in each of the first two live action movies. The first happens to a villain and could be viewed as Nightmare Fuel, while the second happens to Shaggy and is played for laughs.
Hair Decorations: Velma has a flower in her hair at the end of "A Tiki Scare Is No Fair" as she does the hula in her Hawaiian grass skirt. For all her bookworm "plain Jane" descriptions, she was really quite adorable.
Hartman Hips: All over the place in Abracadabra-Doo. Made a bit more obvious due to the movie having lots of Male Gaze moments, and including three of the girls showing up in skintight outfits at least once.
From The 13 Ghosts of Scooby-Doo episode "It's a Wonderful Scoob," a mishap with Time Slime's scepter shows him all the horrors he's faced in his life, Scooby becomes so traumatized that he goes into a 10-Minute Retirement. Vincent shows him a Bad Future to help snap him out of it, though.
Hollywood Torches: Shaggy finds and uses one in Where Are You episode "Spooky Space Kook".
"Home Alone" Antics: A regular occurance after a Let's Split Up, Gang when Scooby & Shaggy are on the run from the monster of the week, then set up some kind of elaborate scenario in order to confuse the monster.
In A Scooby Doo Valentine (episode of What's New, Scooby Doo?) the imposters of the gang are unmasked and revealed to be caricatures of their voice actors (Frank Welker, Casey Kasem, Grey DeLisle, Mindy Cohn). In fact, the valentine they find as a clue has the gang's names written in the handwriting of the voice talents.
Ronald Reagan, U.S. president from 1981 to 1989, appears in caricature (voice of Fred Travalena) in the 13 Ghosts episode "It's A Wonderful Scoob."
Supernatural actors Jensen Ackles, Jared Padalecki and Misha Collins appear as Dean, Sam and Castiel in cartoon form in that show's episode "Scoobynatural."
Shaggy and Scooby always seem to end up finding the weekly monster despite their cowardice, laziness, and complete lack of investigative skills.
Despite the inevitable failure of Fred's convoluted traps to catch the monster, the monster usually ends up trapped by the end of the episode anyway.
Is It Always Like This?: The Scooby-Doo comic book has an issue where a character asks, "And this happens everywhere you go?" Shaggy responds with, "Well, there was this one time where Fred took us to a flower shop..."
Jumped the Shark: invoked Taken literally in the What's New episode "Lights, Camera, Mayhem" as Scooby and Shaggy sail over a tank of sharks on a motorcycle, with Velma cracking the obvious punch line:
Velma: Who would ever think that Scooby would jump the shark?
Kavorka Man: It's not so much that Shaggy is a pimp, but many episodes and movies have shown that many an attractive female seems to think Shaggy is hot. Most recent example is the made-for-video movie Scooby Doo! Abracadabra Doo, which has Velma's kid sister Madelyn with the hots for Shaggy. And now, with Scooby-Doo! Mystery Incorporated, Velma does as well. One wonders how the next family get-together might go. ("I guess we Dinkley sisters have something in common after all.")
Kissing Cousins: One episode of The Scooby-Doo Show featured Scooby-Doo and Scooby-Dum's cousin Scooby-Dee. Both Doo and Dum found her very attractive. Whether or not the fact that they're all dogs eases the weirdness is up to you.
Knight's Armor Hideout: Used to happen every other week. Sometimes This Week's Villain would hide inside the armour while the Mystery Gang charged past; sometimes Scooby and Shaggy would fit into the Hammerspace inside a suit of armour so as to evade detection; on one occasion they tried to hide in the armour only to find the villain was already in there...
What's New Scooby Doo? revels in hanging lampshades on the tropes of the old cartoon, especially in the movies. Common targets include The Reveal dialogue, quirks of the characters, plot tropes, and potential fakeness of the monster.
Lava Surfing: Scooby and Shaggy use this method to get through the Gate of Fire in Samurai Sword.
Let's Get Dangerous!: Shaggy and Scooby when anyone they really care about is in trouble. There was even one moment when Velma was captured and Scooby turned down a Scooby Snack, saying he didn't need it to be persuaded to help rescue her.
Let's Split Up, Gang: Trope Namer, ahoy! It's notable that in the more modern adaptations, it's nearly irresistible to play with this trope more than a little.
Scooby-Doo was infamous for it. Oddly enough, it doesn't apply to the first few DTV movies (Zombie Island, Witch's Ghost, Alien Invaders, Cyber Chase) since the animation is quite lively and fluid. Nowadays it's back to looking pretty cheap. But a lot better than before.
Lampshaded in the 13 Ghosts episode "That's Monstertainment." Scooby appears in a mock-up of the MGM opening title sequence where it reads "Ranna-Rarrera" below it and "Limitus Animatus" around Scooby's face.
Lives in a Van: The Mystery Inc. gang live mainly in the Mystery Machine.
Long Runner: Still making new episodes/movies, 50 years later. In those years of the franchise, there have been 479 series episodes (these include eleven-minute and seven-minute installments and Scooby and Shaggy's Laff-A-Lympics appearances), 10 guest appearances on other shows, two parody spots, 12 specials, 5 made-for-TV movies, two theatrical movies, three commercial shills (2005 spot for Dove shampoo with Velma, Wilma Flintstone and Jane Jetson; 2006 spot for DirecTV with the whole gang, a 2014 spot for State Farm with the gang), a movie theater spot (the gang busts Daffy Duck for jabbering on a cell phone in a theater), and (so far) 24 direct-to-DVD movies.
MacGyvering: Daphne frequently picks locks or otherwise saves the day with everyday items from her purse in What's New, Scooby-Doo? In the second live-action movie, she uses some tape and blush to trip a fingerprint-activated lock so they could escape from a cell that they're being held in. "I enjoy being a girl!"
Velma in the first live action movie (where she's dangling upside down by one foot◊—word is that Linda Cardellini had her skirt taped to her legs), and Velma and Daphne in the What's New episode "Ready To Scare" (the entire gang suspended by their feet).
In "Haunted House Hang-Up," Velma, Shaggy and Scooby fall into a well feet first. Velma's pleated skirt does not rise.
Subverted in "Recipe for Disaster," where Velma and Daphne hold their skirts down after a high-power floor dryer (used after the gang gets soaked) is activated.
Male Gaze: The first scene in the prologue of Abracadabra Doo. Also, a pretty blatant Hartman Hips for added measure.
In the crossover with Supernatural, Sam cannot take his eyes off Daphne's caboose. The way she was drawn in that scene, who could blame him?
Scientists and technicians tend to have names either related to their field of study, or to science in general (e.g. Professor Angstrom). Other minor characters' names sometimes reference their line of work too (e.g. Sue Crose, maker of a sugary drink).
The meddling kids themselves are an odd case, as they actually do manage to solve mysteries... or rather, Velma does, with a little help from Fred and occasionally Daphne. Our main heroes, Scooby and Shaggy, on the other hand, mostly just have exciting chase scenes and eat lots, while Daphne is kidnapped by the villain ("Danger-prone Daphne", indeed) and Fred makes traps that invariably fail but somehow manage to accidentally capture the villain anyway. In the end, it's Velma who figures out who the villain is and explains the mystery to the others.
This is averted hilariously in the movies, in which the cast also realize their shortcomings - Daphne takes down a good number of bad guys after taking martial arts classes and Shaggy and Scooby spend the entire second movie performing investigations on their own to prove their worth (of course, the success of said investigations is pretty limited...)
The third live-action film averts this. Every member of the gang provides something useful, but not at the same degree as the earlier two films (which is correct, as this film is a prequel). Freddy comes up with the plan, Daphne provides the wheels and disguises, Velma provides science and history, Shaggy drives and provides a list of suspects (and the motive), and Scooby actually catches the villain.
The third episode of the original series is a perfect example of this trope. The police would have caught the criminal even if Mystery Inc. had not ended up in the castle.
In "A Clue for Scooby Doo", "Bedlam At The Big Top", and "Never Ape an Ape Man", Scooby and Shaggy do have a major role in solving the case.
For "A Clue for Scooby-Doo", Scooby-Doo finds the air tanks for the gang while Shaggy sits on the rock that opens up the villian's hideout.
For "Bedlam At The Big Top", Shaggy and Scooby-Doo put the Ghost Clown into a trance in which the Ghost Clown thinks he's a chimp.
For "Never Ape An Ape Man", Shaggy takes a picture of the Ape Man without his mask on. Talk about carrying the Idiot Ball, Carl The Stunt Man.
In many later spin offs where Velma and Fred were absent, Shaggy and Scooby were left to use Bugs Bunny style antics to take down the Monster of the Week (who were often real this time).
Velma's uncle Evan and aunt Meg, when their daughter Marcy turned out to be the Villain of the Week in A Scooby-Doo Halloween. They felt guilty for putting Halloween before their own daughter's birthday.
The end of The Mystery Begins features live reenactments of parts of several Scooby-Doo opening themes, including Scooby Doo, Where Are You!, The New Scooby Doo Movies, and What's New, Scooby Doo?.
The entire movie is one big Mythology Gag, when you come to think of it.
A flashback to Velma's childhood in What's New, Scooby Doo? uses the art style of A Pup Named Scooby-Doo. It depicts why she's afraid of clowns.
One of the episodes of What's New, Scooby Doo? features Fred and Velma indisposed, leaving only Daphne, Shaggy and Scooby to solve the mystery by themselves, a la all the later shows before A Pup Named Scooby-Doo.
In the first episode of Mystery Inc., Shaggy mentions that he fell asleep watching "a Vincent van Ghoul movie". Vincent van Ghoul was the group's mentor in The Thirteen Ghosts of Scooby Doo. In the same episode, several previous mysteries are seen in a museum, with Velma mentioning a few mysteries, and giving out the motives and identities of the "monsters".
In A Scooby Doo Halloween, Shaggy is dressed as a werewolf like in Scooby-Doo and the Reluctant Werewolf.
In "Curse of the Lake Monster", the gang receives a check for $10,000 from The Bank of Hanna-Barbera. Also in that movie, Fred and Daphne pretend to be mannequins, dressed in their classic clothing from the cartoons. Fred sees his reflection and contemplate this before saying "nah".
In Scooby Doo and the Cyberchase, the gang's simulated duplicates inside the video game are drawn in the style of the older series. Lampshaded with a quip that the game's designer hadn't seen the gang in a while when he programmed it.
The Scooby segment of the April 1st Batman: The Brave And The Bold episode is not only designed and animated in the same way as the Scooby Doo Movies episodes with Batman and Robin, but it also has the same animation glitches—Batman's neck is exposed (which Bat-Mite points out to his digust) and another scene shows Batman with a gloveless hand with a ring on his finger.
In the episode Scooby Doo And A Mummy, Too, Velma is disguised as Cleopatra (to Shaggy's Marc Antony) in an attempt to hide from the mummy. She actually dresses up as Cleopatra in Scooby Doo In Where's My Mummy? as part of the "Scooby-Doo" Hoax she helps stage.
In "Guess Who's Knott Coming To Dinner," Don Knotts (in the guise of Captain Moody's first mate) identifies Fred as Captain Moody's nephew Ronald. This is probably a nod to Ronnie, which was Fred's original name until he was renamed after CBS programming head Fred Silverman.
The 2012 special Spooky Games uses the same premise as the 1973 Scooby Doo Movies episode "The Spirited Spooked Sports Show'' (with Tim Conway)—Shaggy becoming a competitive runner who runs fastest when he's scared.