Shaggy
See hereScooby-Doo
See hereScrappy-Doo
See hereThe Boo Brothers
Ghost-hunting ghosts who are hired by the trio to rid the estate of several more malevolent (and fake) ghosts.
- Ambiguously Related: Whether their claims of not actually being brothers and were adopted separately is true isn't established. It's possible it was a ploy so that Shaggy wouldn't fire them.
- Big Damn Heroes: They save the day a couple of times.
- Cloudcuckoolander: Shreako.
- Comic Trio
- Enraged by Idiocy: Freako has a habit of smacking his brothers around whenever they goof off or don't listen to his orders.
- Expy: The Ghostly Trio.
- Also a clear take on the Three Stooges — Freako matches Moe, Shreako matches Curly, and Meako matches Larry.
- Forgot About His Powers: They tend to forget that since they're ghosts, non-ectoplasmic beings will just phase through their bodies, which makes occasions where they try to help Shaggy and the others out lead to them falling or getting hurt.
- Hunter of Their Own Kind: They serve as ghost exterminators who are ghosts themselves. They aren't good at it though.
- Informed Ability: The opening of the movie plays a theme song, with the singer being a witch, that talks about how scary and legendary the Boo Brothers are. The actual trio are rather comically inept, though they do save the others on occasion during the film.
- Lovable Coward: Meako is surprisingly afraid of chasing ghosts despite being one.
- Nice Guy: Outside of a joke about Freako's face, Meako causes the least amount of trouble of the three.
- No Celebrities Were Harmed: If it wasn't clear by their mannerisms, the three are based heavily on The Three Stooges, with a grumpy leader, a tall wiseguy and a chubby Nice Guy.
- Only Sane Man: Freako is the one who tends to remind his brothers of their role and orders them, usually Shreako, to stop messing around.
Farquard
Voiced by: Arte Johnson
- Brutal Honesty: He make no secret of how bitter he is about serving Shaggy.
- The Butler Did It: Played with. He isn't the primary culprit but it's very strongly implied that one ghost who only showed up one time in the attic was him in disguise due to that ghost taking a necklace that is in Farquard's possession shortly afterwards.
- The Igor: A hunchbacked, somewhat off-putting servant.
- Older Than They Look: He claims to have been serving as a butler for sixty years but doesn't look older than his forties or so.
- Sunglasses at Night: He wears his sunglasses throughout the entire movie, which mostly takes place at night, only removing them in one brief scene.
- Throw the Dog a Bone: He does get to keep one diamond.
Sadie-Mae Scroggins
Voiced by: Victoria Caroll
A neighboring girl with a crush on Shaggy.- Abhorrent Admirer: She is immediately smitten with Shaggy upon meeting him and becomes protective of him. She's a nice person and, as far as the art style is concerned, very attractive. However, she's so clingy and overly affectionate that Shaggy is more afraid of her than the ghosts.
- All Love Is Unrequited: Sadly for her, Sadie's feelings for Shaggy are never reciprocated.
- Correspondence Course: According to her brother, her immense strength is because she took a "mail-order muscle course" (which he vastly regrets, since she's mostly using what she learned to stop him from getting rid of Shaggy).
- Cute Bruiser: A smiling, scantily-clad woman with a girlish appearance who is capable of effortlessly twisting a rifle barrel in circles.
- Dance of Romance: Falls for Shaggy after dancing with him in what she thought was a party.
- Dating What Daddy Hates: Downplayed. Shaggy is too terrified of her to even consider her a girlfriend, but Sadie-Mae is nonetheless in love with him to the point of wanting marriage. Her brother, and likely her whole family, hate the Beauregard's, regardless of what relation Shaggy actually has with them.
- Expy: Of Daisy Mae Scragg from Li'l Abner. From having a similar sounding name, to being an attractive blonde hillbilly girl in scantily clad clothes with an unreciprocated love for someone who wants her to keep away.
- Farmer's Daughter: Embodies most of the stereotypes.
- Forceful Kiss: She gives Shaggy several unwanted kisses whenever she is able to get her hands on him.
- Fourth-Date Marriage: She becomes smitten with Shaggy the first moment she meets him, and makes clear that she intends to marry him, much to her brother's anger.
- Girlish Pigtails: She has nicely done pigtails.
- Hair of Gold, Heart of Gold: She's friendly to the heroes, a bit too friendly to Shaggy, a stark contrast to her brother.
- Insane Troll Logic: Her method to get Shaggy to reciprocate her feelings is to pretty much force herself on him with unwanted kisses. Based on his disgusted reactions to her attempts, she should have realized that he is not interested in her, yet chalks it up to him playing hard to get with her.
- Love at First Sight: Seconds after dancing with Shaggy, she's immediately smitten with him to the point of insisting she'll marry him.
- Ms. Fanservice: She's drawn to be very attractive, dresses in a revealing outfit and is very physically fit. However, she's too clingy and loony for Shaggy to notice this.
- Muscles Are Meaningless: She is a very short and slim young woman, yet is capable of lifting and spinning Shaggy before accidentally tossing out the door, and twisting her brother's rifle like a pretzel.
- Nice Girl: Her first appearance is going to the Beauregard plantation to ask her new neighbors for a cup of blackstrap molasses. Considering we learn after this that her family despises the Beauregard clan, this means she held no real hate for them and can overlook Shaggy being the colonel's nephew for the sake of what she thinks is their romance.
- Smooch of Victory: When she gets stuck on the branch of a tall tree, she calls out to Shaggy to help her down, promising to give him another big kiss if he does. Unfortunately, Shaggy turned her down, having only just escaped from the last unwanted smooching he had gotten from her.
- Stalker with a Crush: Spends most of the movie following Shaggy and finding places where she can kiss him.
- Violently Protective Girlfriend: The girlfriend part is one-sided, but she beats up or stops her brother from chasing Shaggy several times.
- What Happened to the Mouse?: She's last seen stopping her brother from shooting Shaggy and his friends, trapped in the well. She vows to rescue him, much to his displeasure, before they find another way out. She's not seen again after that.
- Wrong Assumption: She truly thinks Shaggy returns her feelings, and that he is simply playing hard to get, much to her annoyance.
Sheriff Buzby
Voiced by: Sorrel Booke
The local lawman.- Amusing Injuries: Suffers a lot of them, such as a branch he severed with a warning shot falling on his head, and being knocked into a pond by a mechanical horse.
- Doomsayer: Warns Shaggy, Scooby and Scrappy about the ghosts.
- Expy: A Composite Character of Sorrel Booke's The Dukes of Hazzard character Boss Hogg and that series' sheriff.
- Police Are Useless: He's a somewhat bumbling figure easily bested by Billy-Bob and unable to be there to fight the ghosts. He's also the bad guy and not really the sheriff.
- Right Out of My Clothes: Runs right out of his uniform (although not his underwear) when the Ape leans in front of his car window at one point.
- Servile Snarker: To the mayor who calls him a couple times.
- Strongly Worded Letter: He responds to Billy Bob shooting up the place by threatening him with tickets.
Billy-Bob Scroggins
Voiced by: William Callaway
A neighbor feuding with the Beauregard clan.- Big Bad Wannabe: Spends most of the movie trying to outright kill Shaggy and his friends just for his relation to the Beauregard clan, but it's clear he's too incompetent and unlucky to succeed even without his sister around to stop him.
- Knight Templar Big Brother: He doesn't like that his baby sister is in love with a relative of a Beauregard.
- Laughably Evil: He's a gun-totting feuder with no respect for law and order but is too stupid and unlucky to take seriously much.
- My Sister Is Off-Limits: He's unaccepting of the idea of his sister and Shaggy being a couple, unable to see Shaggy is not interested in her.
- Not-So-Harmless Villain: He is trying to murder an innocent man and his canine friends just for being indirectly related to a family that his has been feuding with for years.
- Shipping Torpedo: He will not let his little sister get hitched to a Beauregard.
- Wrecked Weapon: His gun gets wrapped around him by Sadie-Mae, then just plain tied in a knot by her so it fires into his face, and finally gets snapped in half by the ape. He always either has it fixed or replaced by the next time it's seen though.
The escaped Ape
Voiced by: William Callaway
An escaped circus ape causing mayhem throughout the area.- No Name Given
- Not Evil, Just Misunderstood: He's viewed with terror by everyone but Scrappy correctly thinks he's just a playful, dumb easily scared animal.
- Talking Animal: Just like Scooby, the ape speaks a mix of clear and unclear English at times.
The Skull Ghost, the ghost of Colonel Beauregard, the Headless Horseman, and the floating skeleton
Voiced by: William Callaway and Arte Johnson
Various ghosts that plague Shaggy and the dogs throughout the story and hunt for the family jewels.