Caroline was first seen in "How to Pick Up Girls," in which Robbie gets help from Spike on how to impress her. His new-found animalistic behaviour disgusted her greatly. Robbie also embarrassed himself by doing the Mating Dance for Caroline in front of all his classmates ("Dirty Dancin'").
Nevertheless, Robbie managed to befriend Caroline and even ask her out - after swallowing a dose of Thornoids - in "Steroids to Heaven." After their disastrous date, marred by Robbie's thornoid-induced rage, Robbie switched his romantic attentions to Wendy Richfield, daughter of B.P. Richfield.
During her first appearance, Caroline was green with spots, like Mindy (for whom the identical puppet suit was always used). For the third season, a light brown, crested dinosaur with pink stripes was used for female characters. In most appearances (including Caroline Foxworth), Julianne Buescher puppeteered and supplied the voice. Jessica Lundy supplied the voice for other incarnations of the character (when performed by other puppeteers).