Penny is an intelligent, frumpy and wasp-tongued female sidekick and friend to Pebbles and Wiggy.
As a teenager, she is short and slightly plump with fair skin, green (black) eyes, thin black eyebrows, black hair and pink lips.
As an adult in I Yabba-Dabba Do!, her hair style is shorter, her lip color is changed to red, she is now overweight and no longer wears a red headband.
As a teenager, she wears a red headband and also a golden yellow and black leopard-striped vest that hangs down to her knees and a red shirt which also hangs down to her knees.
As an adult in I Yabba-Dabba Do!, she wears indigo-blue glasses, teal earrings, a scarlet-red dress that hangs down to her knees with a orange and black-striped cloth belt and a teal bracelet.
- The Pebbles and Bamm-Bamm Show
- The Flintstone Comedy Hour
- Fred Flintstone and Friends
- The Flintstone Comedy Show
- The Flintstone Funnies
- I Yabba-Dabba Do!