Jack Rabble sold robot models at conventions, sharing a booth with Owen Garrison.
He has grey hair with white sideburns. He is on the heavy side.
He appeared to be friendly and to like Owen, but he was actually a cunning schemer.
He was a participant on Combat Bots, but he was fired because his robots were deemed too dangerous.
Scooby-Doo! Mask of the Blue Falcon
He created robots of bats, a Hideous Hyde Hound, and a Giant Mr. Hyde and attacked the comic convention at the Hotel San De Pedro as Mr. Hyde. His goal was to divert an armored car containing convention receipts so he could rob it.
- He framed Owen, but apparently that was just a diversion (after the armored car robbery it would be clear that there was a second Mr. Hyde).