| Villains | Episodes | Picture |
| 10,000 Volt Ghost | Watt A Shocking Ghost | Picture |
| Beast Of bottomless lake | The Beast Is Awake In Bottomless Lake | Picture |
| Benedict Arnold, Major Andre, & William DeMont | Spirits Of '76 | Picture |
| Black Knight | Scared A Lot In Camelot | Picture |
| Cat Creature | Who Was That Cat Creature I Saw You With Last Night | Picture |
| Chocolate Phantom | The Ghost Of The Bad Humor Man | Picture |
| Creepy Heap From The Deep | The Creepy Hip From The Deep | Picture |
| Demon (Seattle) | A Frightened Hound Meets Demons Underground | Picture |
| Demon Shark | There's A Demon Shark In The Foggy Dark | Picture |
| Diabolical Disc Demon | The Diabolical Disc Demon | Picture |
| Dr. Coffin | The Harem Scarem Sanitarium | Picture |
| Futuristic Creature | The Creepy Cruise | Picture |
| Gator Ghoul | The Gruesome Game Of The Gator Ghoul | Picture |
| Ghostly Gondolier | A Menace In Venice | Picture |
| Ghost Of Capt. Piscato | Scooby Doo, Where's The Crew | Picture |
| Ghost Of Finnyan MacDuff | A Highland Fling With A Monsterous Thing | Picture |
| Ghost Of Juan Diego | Don't Go Near The Fortress Of Fear | Picture |
| Ghost Of King Cotazuma | The Fiesta Host Is An Aztec Ghost | Picture |
| Ghost Of Witch McCoy | ? | Picture |
| Ghost Shaman | A Bum Steer For Scooby | Picture |
| Ghost Viking | The Curse Of Viking Lake | Picture |
| Giant Mantis | The Creepy Creature At Vulture's Claw | Picture |
| Headless Horseman | The Headless Horseman Of Halloween | Picture |
| Jaguarro | Jeepers, It's Jaguarro! | Picture |
| Kelp Monster | Scooby Doo, Where's The Crew? | Picture |
| Loch Ness Monster | A Highland Fling With A Monsterous Thing | Picture |
| Mamba Wamba | Mamba Wamba & The Voodoo Hoodoo | Picture |
| Mamba Zombie | Mamba Wamba & The Voodoo Hoodoo | Picture |
| Merlin | Scared A Lot In Camelot | Picture |
| Moon Monster | Scooby's Chinese Fortune Cookie Caper | Picture |
| No-Faced Zombie | The No-Faced Zombie Chase Case | Picture |
| Octopus Monster | Scooby Doo, Where's The Crew? | Picture |
| Old Ironface | The Creepy Case Of Old Ironface | Picture |
| Owlmen | Watch Out! The Willawaw! | Picture |
| Phantom Barge | The Fiesta Host Is An Aztec Ghost | Picture |
| Phantom Of Milo Booth | The Chiller Diller Movie Thriller | Picture |
| Phantom Racer | Spooky Case Of The Grand Prix Race | Picture |
| Phantom Racecar | Spooky Case Of The Grand Prix Race | Picture |
| Pterodactyl Ghost | Hang In There, Scooby Doo | Picture |
| Ramblin Ghost | The Ghost That Sacked The Quarterback | Picture |
| Skeleton Men | A Creepy Tangle In The Bermuda Triangle | Picture |
| Snowbeast | A Scary Night With Snowbeast Fright | Picture |
| Soulless Capt. Clemens | The Creepy Heap From The Deep | Picture |
| Spectre Of Ebeneezer Crabb | High Rise Hair Raiser | Picture |
| Stone Creature | The Fiesta Host Is An Aztec Ghost | Picture |
| Strawberry Phantom | The Ghost OF The Bad Humor Man | Picture |
| Tanooka | A Bum Steer For Scooby | Picture |
| Tar Monster | The Tar Monster | Picture |
| UFO | A Creepy Tangle In The Bermuda Triangle | Picture |
| Vampire Of Skull Island | The Vampire Of Skull Island | Picture |
| Vanilla Phantom | The Ghost OF The Bad Humor Man | Picture |
| Viking Ghost Ship | The Curse Of Viking Lake | Picture |
| Warlock Anthos & Hound | The Warlock Of Wimbledon | Picture |
| Willawaw | Watch Out! The Willawaw! | Picture |
| Witch Of Salem | Two Switch A Witch | Picture |
