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MYSTERY INCORPORATED! This is only the first rung on the ladder of your demise. And this time, Mystery Inc. you'll be the ones unmasked... as the buffoons you truly are!
~ Jonathan Jacobo as the Evil Masked Figure.

Dr. Jonathan Jacobo, otherwise known as Heather Jasper Howe or The Evil Masked Figure, is the main antagonist of Scooby-Doo 2: Monsters Unleashed. He is a mad scientist who wants revenge on the Mystery Incorporated for capturing and imprisoning him in the past.

As Dr. Jonathan Jacobo, he was portrayed by Tim Blake Nelson, who also portrayed The Leader in the Marvel Cinematic Universe, Dr. Pendanski in Holes and Martin Kirby in Angel Has Fallen. As Heather Jasper Howe, he was portrayed by Alicia Silverstone, who also portrayed Adrian Forrester in The Crush. As the Evil Masked Figure, he was voiced/played by Scott McNeil.

Personality

Dr. Jonathan Jacobo.

Jonathan Jacobo is a typical mad scientist, who wants to create real monsters and enjoy the rampages they caused. After being caught by the Mystery Incorporated, Jacobo held a lifelong grudge and vowed to have his revenge on them at all cost.

As Heather Jasper Howe, she seems to be a benevolent, polite reporter at the first glance, but as the story progesses, she reveals her true nature as a fraudulent, untrustworthy person. It is later revealed that she is just a facade of Jacobo. In addation, the last scene also shows that Jacobo can be angered for simply petty reasons.

Biography

Past

Jonathan Jacobo is a scientist who desired to create monsters. To fund his experiments, he became the Pterodactyl Ghost, wreaking havoc and stealing millions of dollars in a state-wide crime spree. Eventually he was caught by Mystery Inc., unmasked and sent to prison. Jacobo eventually attempted to escape on a hay glider. However, an malfunction occured in the process and he fell into the ocean; his body was never found and he was presumed dead.

Scooby-Doo 2: Monsters Unleashed

The Evil Masked Figure.

In truth, Jacobo had survived, and dressed up like a female reporter named Heather Jasper Howe and an Evil Masked Figure and turned his old Pterodactyl Ghost costume into a real monster with a machine he built, along with costumes of some other past Scooby-Doo monsters to get revenge on Scooby and his friends by destroying them, their reputation and their hometown Coolsville. As Heather, he spreaded information against the Mystery Gang for their failures.

Jacobo later reappeared as the Evil Masked Figure in the climax, controlled all the monsters to fight and kill the Gang. Luckily after a big battle with the Tar Monster, Scooby managed to turn all of the monsters that Jacobo created back into costumes.

After his defeat, the Evil Masked Figure is caught and unmasked in front of the public as Heather Jasper Howe. However, the Mystery Gang suspected something and unmasked her for the second time, revealed that Heather is Jacobo in disguise. Jacobo and the camera man Ned who aids Heather were then sent to jail.

Quotes

So long, SUCKERS!!! Ah, help me, suckers!
~ Jonathan Jacobo escaping prison, only to fall into his supposed death.
Mystery Incorporated, once again you have proven useless before my power! Because of you soon Coolsville will be mine!
~ Evil Masked Figure.
Soon your friends will be dead, And Coolsville destroyed, My revenge will be final, And there's nothing you can do about it!
~ Evil Masked Figure.
I was an excellent Eliza! You were too actually!
~ Jacobo to Winkles
You kept saying you felt puffy!
~ Jacobo to Winkles again
I would have gotten away with it, if it weren't for those meddling punks, and their dumb dog!
~ Jonathan Jacobo after his defeat.
Of course dumkoff.
~ Jacobo’s last words

Gallery

Trivia

  • In the Scooby-Doo Show, a character named Johnny is instead the Pterodactyl Ghost however all these two characters have in common is the same first name and disguise.

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See Also
Adventure Time Villains | Batman Villains | Ben 10 Villains | Catwoman Villains | Cats & Dogs Villains | Cartoon Network Villains | DC Animated Movie Universe Villains | DC Extended Universe Villains | DC's Legends of Tomorrow Villains | Eraser Villains | Game of Thrones Villains | Gremlins Villains | Hanna-Barbera Cinematic Universe Villains | Harry Potter Villains | Lethal Weapons Villains | Loonatics Unleashed Villains | Looney Tunes Villains | Melanie Martinez Villains | Middle-Earth Villains | MonsterVerse Villains | Mortal Kombat Villains | New Line Cinema Villains | Pokémon Villains | Powerpuff Girls Villains | Primal Villains | Regular Show Villains | Rick and Morty Villains | Robot Chicken Villains | Rush Hour Villains | Samurai Jack Villains | Scooby-Doo Villains | South Park Villains | Steven Universe Villains | Superman Villains | The Banana Splits Movie Villains | The Conjuring Villains | The LEGO Movie Villains | The Matrix Villains | Tiny Toon Adventures Villains | Tom and Jerry Villains | TMNT Villains | Wild Wild West Villains | Xiaolin Showdown Villains | Yu-Gi-Oh! Villains

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Television
Scooby Doo, Where are You!: Black Knight | Phantom | Captain Cutler | Miner 49er | Indian Witch Doctor | Elias Kingston | Apeman | Charlie | Puppeteer | Ghost Clown | Big Bob Oakley | Mummy | Witch | Bald Zombie | Space Kook | Redbeard | Phantom Shadow | Snow Ghost | Ghost of Mr. Hyde | Scare Pair | Zen Tuo | Caveman | Creeper | Phony Phantom | Witch Doctor | Werewolf | Wax Phantom
The New Scooby-Doo Movies: Gunslinger | Geronimo | Hooded Man | Vulture | Scarecrow | Captain Moody's Ghosts | Phantoms | Zalia Z. Fairchild | Shark Men | Cackling Skeleton | Ghost of Bigfoot | Red Baron | Redbeard's Ghost | Haunted Horseman | Moat Monster | Viking Mannequin | Davy Crockett Mannequin | Dryad | Troll | Ghost of Paul Revere | Minuteman Ghost | Redcoat Ghost | Hooded Ghosts | Captain Scavenger | Injun Joe | Jadal | Fireball McPhan | Lorne Chumley | Windmakers | Green Globs | Ghostly Strongman
The Scooby-Doo Show: Ebenezer Crabbe | Netty Crabbe | Ghost of King Katazuma | Aztec Statue Monster | Gator Ghoul | 10,000 Volt Ghost | Headless Horseman | Ghost of Merlin | Black Knight | Dr. Coffin | Ambulance Guys | No-Face Zombie | Gorilla | Mamba Wamba | Zombie Lila | Mamba Zombie | Demon | Tamuka | Medicine Man Ghost | Demon Shark | Octopus Monster | Kelp Monster | Captain Pescado | Rambling Ghost | Technicolored Phantoms | Spirits of '76 | Viking Ghosts | Gramps the Vamp | Pterodactyl Ghost | Phantom of Milo Booth | Phantom Racer | Witch McCoy | Zombie | Futuristic Monster | Sea Creature | Captain Clements | Willawaw | Owlmen | Skeleton Men | Snow Beast | Ghost Witch of Salem | Tar Monster | Ghost of Finnyan McDuff | Old Iron Face | Jaguaro | Cat Creature | Mantis Creature | Disc Demon | Moon Monster | Ghostly Gondolier | Ghost of Juan Carlos | Anthos | Beast of Bottomless Lake
Scooby-Doo and Scrappy-Doo: Blue Scarab | Night Ghoul | Alien | Neon Phantom | Snake Demon | Sky Skeleton | Dragon Beast | Devil Bear | Sea Beast | Lady Vampire of the Bay | Star Creature | Shadow Creature | Ghost of Jeremiah Pratt | Great Haldane | Minotaur | Carl and Tony
The Richie Rich/The Scooby-Doo Show: Sylvester | The Burglar | Arabian Magician | Cat Man | Sailor | Werner Wolf
The New Scooby and Scrappy-Doo Show: Olaf the Terrible | Viking Pirates | Seaweed Monster | Great White Shark | Mud Monster | Hound of Bakervilles | Dinosaur | Creature from the Chem Lab | Masked Manx | Mr. Cyclops | Ivan | Randar the Ape-Man | Neanderthal Monster | Chameleon | Phantom of the Soaps | Clown | The Minotaur | Casey O'Reily | Gremlin | Specter of Sports Cars | Chef Maras | Mummy | McBaggy Roger
The New Scooby-Doo Mysteries: Red Skull | Maid Mummy | Norma Deathman | Sea Demons | Cyclops | Mastermind | Giant Bees | Ebenezer Overview | Codefinger | Zombies | Evil Elf | Mad Sea Lion | Dr. Van Helsing | Ghost of George Washington | Ghost of Abraham Lincoln | Colonel Beauregard | Laser Band Thief | Ghost of Sherlock Holmes | Monster Mutt | Monster Mouse | Ghost of Christmas Never
The 13 Ghosts of Scooby-Doo: Bogel and Weerd | Werewolves | Maldor the Malevolent | Queen Morbidia | Reflector Specter | Zomba | Captain Ferguson | Nekara | Marcella | Time Slime | Demondo | Rankor | Professor Phantazmo | Zimbulu
A Pup Named Scooby-Doo: Green Ghoul | Sludge Monster | Cheese Monster | Dr. Croaker | Al Cabone | Manny the Mauler | Boogedy Bones | Ice Demon | Samurai Ghost | Headless Skateboarder | BooBeard | Totem Spirit | Ghost Chef | Stinkweed | Dogcatcher Ghost | Alien Slug | Ghost of Purvis Parker | Chickenstein | Burger Monster | Dinkley 2000 | Zombo | Boogey Biker | Astronaut Ghost | Bigwig | Hooded Heifer | Moving Mollusk | Nasty-Doo | Buster McMuttMauler | Ghost of Mrs. Shusham | Waitro
What's New Scooby-Doo?: Snow Creature | Dinosaur Spirit | Space Ape | Leland Brothers | Possessed Mystery Machine | Ghost of Rufus Raucous | Jungle Demons | Motoshondu | Headless Snowman | Living Toys | Faceless Phantom | Zombie Gladiator | Baseball Specter | 30 Foot Shaggy | Mummy | Mademoiselle Chantal | Gusano Grande | Jeeves | Vampire | Marcy | Cat Creature | San Franpsycho | Invisible Madman | Scooby Snack Monster | Glasburgh Dragon | Fish Fiend | Wakumi | Centaur | Creepy Keeper | Cold Steel | Evil Mystery Inc. | Titanic Twist | Demon Farmer | Frozen Fiend | Menacing Metallic Clown | Toxic Terror | Hong Kong Dragon | Skeleton Driver | Gold Monster | Coral Creature | Rama Yam | Osomon
Scooby-Doo! Mystery Incorporated: Slime Mutant | Gator People | Ghost Truck | Man-Crab | Que Horrifico | Alice May | Phantom | Gnome | Humungonauts | Fright Hound | Vampire | Char Gar Gothakan | Cicada Creature | Lord Infernicus | Shadowy Orc | Aphrodite | Danny Darrow | White Wizard | Nightfright | Fish Freaks | Manticore | Headless Horror | Shadowy Figure | Dead Justice | Obliteratrix | Freak of Crystal Cove | Crybaby Clown | Baba Yaga | Dreamweaver | Junk | Graveyard Ghoul | Dark Lilith | Hebediah Grim | Fiend | Scarebear | Dragon | Dr. Zin | Mummy | Aliens | Rude Boy and the Ska-Tastics | Gluten Demon | Dandy Highwayman | Fake Fred | Old Daphne | Priestess | Mr. E | Ed Machine | Professor Pericles | Evil Entity | Krampus (Scooby Doo: Mystery Incorporated | Kriegstaffebot |
Be Cool, Scooby-Doo!: Elias Kingston | Zatari Warrior Spirit | Sea Creatures | Gargoyle | Ghost of Chip Braverton | Sobek | Crystal Crawler | Headless Count | Ghost of Prima Donna | Yeti | Butler 3000 | Alien | Phantoms | Pterodactyl | Stealin' Stan | Gremlin | Sorcerer | Swamp Beast | Mr. Roundy | Cyclops | Scarecrows | Cliff Bride | El Bandito | Madcap | Viking Ghosts | Toxic Mutant | Baba Yaga | Dorsalfoot | Werewolf | Evil Jester | Houndbeast | Disorient Express Monsters | Kaniaku | Ghost of Amos Littlefield | Skull Alien | Ghost of Mother | Ghost of Archie Barnes | Mutant Rabbit | Arachne | Vampire | Plant Monster | Minus | Bubby | Iceman | Ape Man | Garbage Monster | Ghost Chef | Demon of Salem | Professor Huh | Rose
Scooby-Doo and Guess Who?: Bee Man of Alcatraz | Swamp Monster | Ghost Sergeant | Fish Monster | Screaming Skulls of London | Cat Mummy | Minotaur | Hugo Hauser | Madds Markson Monster | Technomancer | Spectral Speedster | Dinosaurs | Sia Doppelganger | Pazzo the Ghost Clown | Man-Bat | Joker

Animated Movies
T.J. Buzby | Revolta | Grim Creeper | Colonel Calloway | Dracula | Simone Lenoir | Lena Dupree | Jacques | Snakebite Scruggs | Morgan Moonscar | Ben Ravencroft | Sarah Ravencroft | Max | Steve | Laura | Phantom Virus | T-Rex | Bill McLemore | Sea Serpent Smugglers | Wildwind | Yowie Yahoo | Mr. Smiley | El Chupacabra | Loch Ness Monster | Snookie Waeawa | Tiny-Tikis | Wiki-Tiki | Amelia von Butch | Ghost of Cleopatra | Biff Wellington | Mr. Mysterio | Professor Jeffries | Krudsky | Goblin King | Sojo | Robot Ninjas | Island Tribe | Miss Mirimoto | Black Samurai | Ranger Knudsen | Babyface Boretti | Ricky LaRue | Cookie | Shannon Lucas | Inferno | Rafe & Kyle | Ye Phantom Parrot | Clayface | Crimson Cloak | Riddler | Red Ghost | Bradley Bass | Asmodeus | Cat Creatures | Dick Dastardly (2020) | Muttley (2020) | Rotten Robots | Dusty | Cerberus

Live Action Movies
Scrappy-Doo | N' Goo Tuana | Zarkos | Demons | Luna Ghost | Jonathan Jacobo | Principal Deedle | Ezekial Gallows | Prudence Prufrock | Wanda Grubwort | Lake Monster

Video Games
Ghoul King | Mastermind | Mindi Stiles | Robert Zabrinski | Selena Drake | Walter Peabody | Ghost Hunter Haunter | The Phantom | Toy Robotus | The Deep One | Witch Queen