|“||So long, SUCKERS!!!||„|
|~ Jacobo escaping from prison.|
|“||MYSTERY INCORPORATED! This is only the first rung on the ladder of your demise. And this time be the ones unmasked... as the buffoons you truly are!||„|
|~ Jonathan Jacobo as the Evil Masked Figure.|
|“||I would have gotten away with it... if it weren't for those meddling punks, and their dumb dog!||„|
|~ Jonathan Jacobo after his defeat.|
Dr. Jonathan Jacobo is the main antagonist of Scooby-Doo 2: Monsters Unleashed.
Over the years Mystery Inc apparently caught him committing crimes dressed like a Pterodactyl Ghost.
Jacobo always wanted to create real monsters with a book.
Years later, he broke out of jail on a hay glider to get revenge on them. He dressed up like a female reporter named Heather Jasper Howe and an Evil Masked Figure and turned his old Pterodactyl Ghost into a real monster with a machine he built, along with costumes of some other past Scooby-Doo monsters. They planned to get revenge on Scooby and his friends by destroying them and their hometown Coolsville. Luckily after a big battle with the Tar Monster, Scooby managed to turn the monsters Jacobo had created back into costumes.
Jacobo was unmasked twice before being sent to jail.
- "So long, SUCKERS!!!"
- "Help me, suckers!"
- Jacobo's plan to get revenge on Scooby and his friends is similar to why Scooby's own Nephew Scrappy-Doo was the main villain of the first live-action Scooby-Doo movie (Monsters Unleashed is the sequel to that movie)
- Both of them plotted revenge against Scooby and his friends after being wronged by them. (Scrappy because Fred kicked him out of the group for peeing on Daphne; Jonathan because they foiled his scheme.)
- Both of them spend years plotting revenge and dressed up like people (Scrappy dressed up like Emile Mondavarious, Jonathan dressed up like Heather Jasper Howe)
- Both of them had real monsters to do their bidding (Scrappy met a punch of purple demons, Jonathan turned classic fake Scooby-Doo Monsters into real monsters)
- However while Scrappy might be remediable, perhaps in the long shelved third live-action big screen Scooby-Doo movie, Jacobo doesn't look very redeeming.
- He was portrayed by Tim Blake Nelson who also plays Samuel Sterns/The Leader in The Incredible Hulk.