A

• Larry P. Acme
• Al
• Ali (The Curse of Tootincandy's Tomb)

B

• Baptiste
• Barney
• Bentley
• Rue Bernard
• Bold Gold CEO
• Bruno the Cable Car Operator

C

• Carl and Tony
• Mr. Carp
• Charlene
• J.C. Chasez
• Evander Cranapple
• Sam Crenshaw
• Crybaby Clown
• Mr. Cyclops

D

• Dandy Highwayman
• Danny Darrow
• Eve De La Faye
• Ace Decade
• Danny Divine
• Mr. Dilly
• Scrappy-Doo (Scott Innes)
• Whitney Doubleday
• Anton DuChampe
• Dula

E

• Ernesto

F

• Zalia Z. Fairchild

F cont.

• Sam Farren
• Cam Filbert

G

• Ghost of Ward Montgomery
• Ghost of Witch McCoy
• Dr. Grimsley

H

• Gene Haultrey
• Baylor Hotner
• Jack Hunter

I

• Igor

J

• Jewel thief (Monster Museum)
• Spencer Johnson

L

• Laser band thief
• Lenny (A Bum Steer For Scooby)
• Librarian (Stand and Deliver)
• Lila
• Luis

M

• C.L. Magnus (Go Away Ghost Ship)
• Mario
• Mascot Monster
• Mr. McGil
• Meadow
• Crawdad Mike's bus driver
• Crawdad Mike
• Emile Mondavarious (Scrappy-Doo)
• Captain Moody's nephews
• Jim Moss
• Museum guide (Scooby-Doo! and the Monster of Mexico)

N

• Dr. Najib
• Gibby Norton

O

• Omar and Khyyam

P

• Professor Pericles
• Zeb Perkins
• Phineus Phibes
• Daniel Prezette

R

• Ratfield
• Revolta
• Roger (Mamba Wamba and the Voodoo Hoodoo)
• Reggie Rungout

S

• Scare Pair
• Shadowy Orc
• Skate Monster
• Captain Skunkbeard
• Smith Snipper
• Specter of Sports Cars
• Roger Stevens
• Swamp Rat

T

• Time Slime
• Tiny Tikis

V

• Vendetta
• Curator Vronsky

W

• Stuart Wetherby
• Mr. Wickles
• Wonga
• Wu

Y

• Yowie Yahoo

Z

• Zacko Zane
• Zeke Zillion
• Zombie (Scooby-Doo Mysteries)