Jax Minner is a former circus strongman turned insurance agent who disguised himself as the Red Humungonaut to his brother and rival insurance agent, Max Minner who dressed up as the Green Humungonaut.
Jax is a large, middle-aged Caucasian male, with blond hair and a mustache. He has a scar across his left eye. He wears a green or black two piece suit with a cream colored shirt and green tie. In his early life as a circus strongman, he wore a striped tank top, shorts, and lace up boots.
He and his brother have a strong mutual dislike and they easily lose their temper with each other.
Skills and abilities
As a former circus strongman he has stupendous strength. His feats as the Red Humungonaut were done using his own muscle power.
Jax Minner and his brother Max were former circus strongmen until the latter left for a rival circus. Eventually, Jax and Max ran their own insurance agencies, becoming even bigger rivals.
Scooby-Doo! Mystery Incorporated
The brothers set out to destroy the properties the other insured, with Jax disguising himself as the Red Humungonaut.
When it came to a dock that Mystery Incorporated set a trap for, the Red Humungounaut ended up fighting the Green Humungonaut until both Humungounauts easily got caught in Fred Jones, Jr.'s trap. When Sheriff Bronson Stone and Mayor Fred Jones, Sr. arrived with the cops, Velma Dinkley unmasked the Humungounauts as Max and Jax Minner. After their back-story, Max and Jax stated that they would've got away with it to "if it weren't for my meddling brother." This caused the brothers to fight again as two police officers tried to break it up.
- A billboard makes Jax look gray.