When Darkwing goes back in time to the age of dinosaurs, he discovers the ancient scientists are being threatened by a T-Rex and his gang. To keep himself and the citizens from becoming Johnny's next entree, he challenges him to a road race. Eventually, Johnny is encased in amber, and after eons pass, scientists recover his ageless body, still frozen and assumed alive. He was voiced by Chick Vennera.
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Nothing is known about Johnny.
As both a tyrannosaurus and biker gang leader, Johnny is a complete bully.
Johnny is a blue Tyrannosaurus rex that wears a black biker cap with a matching leather jacket and a white scarf.