For the character's inspiration from standard continuity, see Johnny (Hang in There, Scooby-Doo).
Expansion This needs a stretch. (Feel to remove when satisfied of completion.)
* Physical appearance.
* Personality.
* History.
Jonathan Jacobo
Jonathan Jacobo
Vital Statistics
Alias Jacobo
Species Human
Gender Male
Hair color Brown, with traces of gray
Eye color Brown
Other Statistics
Occupation Scientist (incarcerated)
Production Details
First appearance Scooby-Doo 2: Monsters Unleashed
Played by Tim Blake Nelson

Dr. Jonathan Jacobo is a former scientist who dressed up like the Pterodactyl Ghost to pull off bank robberies for his experiments to create real monsters.

Physical appearance

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Early life

After being defeated by Scooby-Doo and the gang, he was taken to jail, and his subsequent escape resulted in a near-death experience.

Scooby-Doo 2: Monsters Unleashed

Jacobo unmasked

Jacobo unmasked.

Years later, he enacted an more complex plan involving the recreation of Scooby's previous monster enemies. Taking on the guise of both Heather Jasper Howe and the Evil Masked Figure, his goal was to discredit Mystery Inc. and eventually destroy them (with the help of Ned). He pinned it all on Old Man Wickles and framed him by putting the Black Knight Ghost and the monster book in his mansion. His plan was foiled when Scooby outwitted his monsters and used the control panel to destroy them. Jonathan and Ned were later taken to prison.[1]



Jacobo: So long, suckers! (glider begins to brake) Agh! Help me, suckers!

Jacobo: I would have gotten away with it... if it weren't for those meddling punks, and their dumb dog!


  • The original Pterodactyl Ghost in The Scooby-Doo Show was Johnny, who operated a delivery truck, and his criminal activity was about bootleg cassette tapes, not bank robbery. This is such a significant continuity difference that Jonathan Jacobo should probably be regarded as a different character than Johnny, either an AU version or a second criminal who used a Pterodactyl disguise.

In other languages

Actor Language Notes
Marcus Off German
Eric Etcheverry French


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