There are times he gets lucky in what he does just happens to be heroic enough to save the day (once when Jeannie was trapped in a bottle and surrounded by a force field that only sound could penetrate, Scooby howled at a pitch high enough to shatter the bottle's glass).
Idiot Ball: Scooby carries this throughout some movies and incarnations.
Invincible Incompetent: With Shaggy. They always seem to end up finding the weekly monster despite their cowardice, laziness, and their -usually- complete lack of investigative skills.
Large Ham: Often in the original series when he needs to be the bait and tries to get out of it.
Let's Get Dangerous: When anyone he really cares 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.
Big Eater: With Scooby. If Fred wants to find a 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.
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.
Lovable Coward: In the early seasons it's justified as even though the so-called monster is a person pulling a Scooby-Doo Hoax, they are still sometimes dangerous criminals who will kill if their trick doesn't scare off the intruder. Later season remove that fact.
Stoners Are Funny: Shaggy from Scooby-Doo may or may not be an actual stoner, but how can people not jump to that conclusion? He's always hungry (he eats dog treats, for crying out loud), he's always freaking out over monsters, he thinks his dog (Scooby) can talk, and he even looks and speaks like a hippie stereotype. Talk about Getting Crap Past the Radar.
Valley Girl: Like, a male example of Hippie Speak. Still doing it forty years later, man.
Ventriloquism: Shaggy will sometimes use his ability to "throw his voice" to fool the villains.
Wag the Director: Shaggy becomes vegetarian whenever Casey Kasem plays him in modern times, because Kasem himself is vegetarian and refused to reprise the role otherwise.
Velma Dace Dinkley
Voiced by: Nicole Jaffe (1969-1973, 2001, 2003-2004) Pat Stevens (1976-1982) Marla Frumkin (1979) Christina Lange (1988-1991) BJ Ward (1984, 1997-2001) Mindy Cohn (2002-2013) Linda Cardellini (2002-2004 Live-Action movies) Hayley Kiyoko (Cartoon Network movies)
Adaptational Attractiveness: Varies, but she gets hit with this semi-often. While not truly ugly, Velma is traditionally overweight looking, with a short-and-stout appearance, tacky haircut and a relatively plain face. Starting with Scooby-Doo on Zombie Island, this started to change somewhat, especially in What's New, Scooby-Doo? and the movies (much like Shaggy): where she's made very petite with a tiny waist and an hourglass figure, with a cute-as-a-button face to boot. And in the live action films, she's played by very attractive actresses. The most recent animated movies fuse these two somewhat, and Mystery Inc brings back her original appearance, but with a very stylized appearance.
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).
Perpetual Smiler: Unless something annoys or scares her, she can almost always be seen sporting a content smile no matter what's going on - especially noticeable during the summations, which she almost always does with a big smile on her face. Particularly used in the more recent movies, where most things that make her frown last less than a few seconds.
Voiced by: Frank Welker (1969-1983, 1997-2013) Carl Stevens (1988-1991) Freddie Prinze Jr. (2002-2004 Live-Action movies) Robbie Amell (Cartoon Network movies)
Badass Driver: One of the main reasons why he is needed on the team(along with leadership skills), because when you see the insane obstacle courses the gang encounter in all of these mysteries, you know that Fred hasto be an awesome driver to make sure the mystery is solved. He never disappoints in this field.
Bowties Are Cool: Fred's stubborn attachment to his apricot ascot has evolved into a variant of this.
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 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".
Vocal Evolution: Fred has developed a Minnesotan accent as a result of the character's personality becoming increasingly goofier.
Voiced by: Lennie Weinrib (1979-1980) Don Messick (1980-1986) Scott Innes (2002 Live-Action movie)
Scooby's more courageous nephew. The one who yells, "Let me at 'em!", when he sees the Monster of the Week. To prevent spoilers, some of Scrappy's tropes from the 2002 movie Scooby-Doo are not listed here.Scrappy is famous as the Trope Namer for The Scrappy. But that's an audience reaction, and belongs in our YMMV section.
Brooklyn Rage: In his earliest appearances he had a definite Brooklyn accent, which was toned down after a while.
Catch Phrase: "Da-da-da-da-da-da, Puppy Power!" and "Let me at 'em, Let me at 'em!"
Cousin Oliver: Scrappy was not in the original cast, but joined later. He is much smaller (and so we presume, much younger) than Scooby, Shaggy, or the rest of the original cast.
Bed Sheet Ghost: Three! The Phantom of Vazquez Castle, the ax-wielding phantom from "Haunted House Hang-Up", and the Ghost of Scooby Manor in "Scooby's Roots" which, bizarrely, turned out to be a real ghost in a costume.