How are Don Quixote's helmet horse and mistress examples of parody?

Don Quixote's helmet is a parody because it is actually a barber's basin that he believes to be a magical helmet. His horse, Rocinante, is a parody as it is old and thin, not the majestic steed Don Quixote imagines. His mistress, Dulcinea, is a parody because she is a simple peasant woman who Don Quixote imagines to be a noble lady. These elements serve to satirize the romanticized ideals of chivalry.