No romance de origem do filme ( Who Censored Roger Rabbit? ) há todos os indícios de que toons têm sido em torno de enquanto seres humanos regulares. Há algumas especulações de que toons e humanos são ambos descendentes da mesma árvore evolucionária.
Had the DeGreasy boys been discovered frozen beneath some Arctic tundra, a good case would probably have been made for their being the long-sought missing link between humans and Toons.
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"Not particularly. No more so than I imagine it might be for you to throw one of your fingernail clippings into a trash can. Oh, I'm sure there are primitive tribes in Africa or somewhere who treat their doppelgangers as mystic offshoots of their soul, but we modern, civilized Toons regard our doppelgangers as animated mannequins, nothing more."
Os Toons parecem estar bem estabelecidos tanto na América pré-colonial como em grande número na Indochina.
His great-great-great had crossed over from the old country on board the Mayflower and had been the guy who arranged to have the nation's first Thanksgiving dinner catered by the Toons the colonists found living here. For this Jess's ancestor got his name in the history books. Another of Jess's relatives had imported thousands of Toons from China to build the nation's first transcontinental railroad. They became known as the Yellow Kids and won that relative a spot in the history books, too.