Preposterous

 Preposterous  is Oscar the Grouch 's puppy who appeared on Sesame Street in the early 1990s. He is a Groucher Spaniel, a Grouch dog breed.

Preposterous just lies around & doesn't do anything; he doesn't like to bark or play. Although, sometimes he would actually attack Oscar.

The dog also appeared in The Adventures of Elmo in Grouchland, seen wandering around the streets of Grouchland USA.

TV/Movies/Specials

 * Sesame Street
 * Episode 2887
 * Episode 2914
 * Episode 3080
 * Episode 3256