Super Grouch is a 1-appearance character from Sesame Street. Played by Oscar the Grouch, Super Grouch is a loose parody of Superman, the world famous DC Comics superhero who was brought to life multiple times by the late (but great) Christopher Reeve.
Once his new cape comes, he shouts "O frabjous day!" & throws the old one away. But when Oscar picks up the discarded cape, he discovers that he can use it to fly around his trash can, claiming he is "Super Grouch!