Note: This is a character page for characters featured only in installments of the Scooby-Doo video game series. If you're looking for members of the gang or recurring characters throughout the franchise, visit the main Scooby-Doo character page. If you're looking for characters from Scooby-Doo! Mystery Incorporated, visit its character sheet.
ALL SPOILERS ARE UNMARKED. You have been warned.
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Scooby-Doo! Night of 100 Frights
Holly Graham/Mastermind
Holly Graham
Voiced by: Grey DeLisle (Holly Graham), Tim Curry (Mastermind)
The cousin of Daphne who uses holograms.
- Big Bad: The Mastermind is the main villain, having brought back past foes of Mystery, Inc. to try and defeat our heroes.
- Big Bad Friend: It turns out that Daphne's cousin Holly Graham is the actual mastermind of the operation, who used her know-how of Mystery Inc.'s previous cases to orchestrate everything.
- Chekhov's Gunman: Holly, Daphne's cousin who Scooby rescues early in the game and then vanishes afterwards, turns out to be the main villain.
- Final Boss: The game ends with a final boss fight against the Mastermind.
- Hologram: Holly Graham is revealed to be the Mastermind, using a hologram of herself so that both she and the Mastermind could be at the same place at the same time. The gang's old foes are also revealed to be holograms. This is foreshadowed by Holly's name being a pun on the word, "hologram", which Shaggy lampshades.
- Large Ham: The Mastermind. Though what else would you expect from Tim Curry?
- Punny Name: Holly Graham = Hologram. Fitting for a villain who specializes in holograms.
- Reused Character Design: Holly's design is just Daphne's model, just tweaked.
- Villain Song: Mastermind gets one in the final boss fight, complete with boasting about how he's too clever for Scooby and friends to defeat him.
Alexander Graham
Professor Alexander Graham
Voiced by: Tim Conway
Groundskeeper
Gatekeeper
Voiced by: Don Knotts
The Groundskeeper shown in the game.
- The Butler Did It: Shaggy initially suspects him as the culprit. Much to his frustration, the groundskeeper comes out to complain how the groundskeepers are prime suspect for every mysteries.
- Breaking the Fourth Wall: The Gatekeeper was wondering why are there so many Scooby snacks around.
- Ink-Suit Actor: He pretty much look like his voice actor.
- No Name Given: Mystery Inc. doesn't know his name.
Scooby-Doo: Mystery Mayhem
Alan Dinsdale
Travis Sherman
Travis Sherman
Voiced by: Jeff Bennett
The head of ShermanTech.
- Big Bad: He uses the Tome of Doom to acquire more land and an alpha wave modulator to brainwash people into buying his products, is a figurehead for Selena Drake, his employee who uses the Tome of Doom to assist in her plan to mind-control the world.
- Corrupt Corporate Executive: Aside from using the Tome of Doom to assist in land acquisition by scaring people away with the monsters to force the owners to sell, he also intends to use Selena Drake's alpha wave modulator to brainwash everyone into buying only the products his company makes.
Selena Drake
Selena Drake
Voiced by: Grey DeLisle
The executive chief officer of ShermanTech.
- Mad Scientist: Her main goal to use the alpha wave modulator to control everyone's minds.
Walter Peabody/The Ghost
Walter Peabody
Voiced by: Jeff Bennett
Alan Dinsdale's assistant at the Hambridge University Library.
- Starter Villain: He is the first villain encountered in the game.
Scooby-Doo! Unmasked
Marcy and Winslow Stanton
Marcy and Winslow Stanton
Voiced by: Adam West (Winslow), Grey DeLisle (Marcy)
- Big Bad Duumvirate: They are the main antagonists of the game.
Maggie Xi/Zen Tuo
Maggie Xi
Voiced by: Kim Mai Guest (Maggie Xi), Fred Tatasciore (Zen Tuo)
- Starter Villain: She is the first villain encountered in the game.