Mr. Greasemonkey

 Mr. Greasemonkey  is a friend of Oscar the Grouch 's, who apparently works for the Department of Grouch Transportation. Mr. Greasemonkey, so far, has made only a single appearance on Sesame Street (episode) unknown)

Grouches install a bus stop in the middle of Kermit the Frog's home. Kermit begged Oscar  to take the bus stop sign back but  Oscar  had no power over it. He did, however, ask Kermit how he managed to get the sign in his house, cause Oscar, for months, had been trying to get in his  trash can.

Eventually, more Grouches saw the bus stop, & eventually, a bus came crashin right through Kermit's living room wall filled with other passenger Grouches, includin Oscar 's girlfriend,  Grundgetta.

TV/Movies/Specials

 * Sesame Street
 * Episode unknown