Penelope "Penny" Pitstop is a southern belle, and the only female racer in the original Wacky Races lineup, driving a pink car known as The Compact Pussycat which has personal grooming facilities that would sometimes backfire on other racers, such as shampoo foam hitting their faces.

Penny was always thankful for their assistance and was perhaps the most peaceful racer on the track, though she twice gave the Creepy Coupe's dragon and serpent a good bashing with her umbrella.

In Wacky Races, Penelope has long blonde hair in a full fringe and she tied back into a ponytail with a hot pink scrunchie.

She wears a hot pink long-sleeved jacket with a matching belt and long magenta scarf, which is hanging loose on the right side.

In the 2017 reboot and sequel to the original Wacky Races series, she also has an evil twin sister named Pandora Pitstop.