List of Villains[]
- Duchess and Kittens' Great Adventures
- Dr. Cat
- Dracula/Yellow
- Punk Kitty (bad later good in the sequel)
- Lil' Meow Meow (bad later good in the sequel)
- Phat Cat (bad later good in the sequel)
- Fishbone (bad later good in the sequel)
- Purple Cats
- Mountain Lion
- Duchess and Kittens' Great Adventures 2: Goes to Hollywood
- Phantom/Mr. Yellow
- Vampire
- Jack the Ripper
- Mummy Cat
- Cave Cat
- Space Cat
- Pirate Cat
- The Killer Clown Cat
- Duchess and Kittens' Great Adventures 3: The Adventure of Japan
- Princess Primlock
- King of the Cat
- Osaka/Oni
- Rei and Ranma
- Dragon
- Kitsune
- Japanese Ghosts
- Thorn Princess Valley
- Jenner
- Sullivan
- Butch
- Sullivan's twin sons
- Boss
- Pony and Basil
- Meathead
- Lightning
- Topsy
- Duchess and Kittens' Great Adventures 4: Maximillian's Parents
- Butch
- Meowrice
- Tin, Pan and Alley
- Mellow Man
- Princess Primlock
- King of the Cat
- Duchess and Kittens' Great Adventures: Tom Jr. and Kitty's Great Adventures
- Topsy
- Chino the Kitten
- Chino's Mother
- Duchess and Kittens' Great Adventures 5: The Adventure of China
- Meathead
- Princess Primlock
- Queen of the Cat
- Tai
- Si
- Am
- Duchess and Kittens' Great Adventures 6: Mercat's Kingdom
- Butch Dog
- Princess Primlock
- Sea Witch
- Shark
- The Sea Serpent
- Duchess and Kittens' Great Adventures 7: The Mysteries of the Last Vampire
- Vampire
- Fat Vampire
- Short Vampire
- Tall Vampire
- Thorn Princess Valley 2: The Legend of Aurora
- Sarafina
- Jenner
- Sullivan
- Sullivan's twin sons
- Jenner's Henchmen
- Weasel
- Mountain Lion
- Duchess and Kittens' Great Adventures 8: The Legend of Mummy
- Katy/Mummy
- Princess Primlock
- Duchess and Kittens' Great Adventures 9: Stone Age's Kingdom
- King Leonard
- Spinosaurus
- Duchess and Kittens' Great Adventures 10: The Adventure of England
- Butch
- Meowrice
- Princess Primlock
- King of the Cat
- Mellow Man
- Duchess and Kittens' Great Adventures 11: Pizza's Restaurant
- Lucifer
- Princess Primlock
- King of the Cat
- Duchess and Kittens' Great Adventures: Glory's Wedding
- Lady Katasita
- Princess Primlock
- King of the Cat
- Queen of the Cat
- Tin, Pan and Alley
- Duchess and Kittens' Great Adventures 11: Pizza's Restaurant
- Warren T. Cat
- Digit
- Princess Primlock
- Queen of the Cat
- Duchess and Kittens' Great Adventures 12: The Oliver and Duchess' Adventures of New York
- Sykes
- Roscoe
- DeSoto
- Duchess and Kittens' Great Adventures 13: The Legend of Dragon
- Labyrinth
- Dragon Labyrinth
- Duchess and Kittens' Great Adventures 14: Frankenstein's Resurrected
- Dr. Saruta
- Princess Primlock
- Thorn Princess Valley 3: Daughter of Jerry
- Ratigan
- Fidget
- Ratigan's Henchmen
- Felicia
- Duchess and Kittens' Great Adventures 15: The Cursed of Were-Cat
- Dr. Freakstein
- Thomas O'Malley (Werecat)
- Duchess and Kittens' Great Adventures 16: Roquefort the Mouse Detective
- Professor Baron
- Princess Primlock
- King of the Cat