Fernando

Fernando is Oscar's pet flea, whom he auditions for the Bunkam and Ballyhoo Circus when P. T. Bunkum comes to Sesame Street in Episode 1451.

Fernando rehearses in Oscar's own makeshift flea circus where he runs over a jellybean, leaps through a cigar band, and runs around a bottle cap. Although he can't be seen, his feet can be heard tapping on the surface of an aluminum plate, and he makes faint squeaky noises.

To satisfy skeptics, Fernando can be ordered by Oscar to run about the bodies of his critics, thereby putting to rest any question of his existence.