sentences:  Mr. Hankey has appeared in various Christmas episodes, and inspired an actual retail CD "Mr. Hankey's Christmas Classics" in which he has his own theme song.In his first appearance, he appeared anthropomorphic only to Kyle and Chef, although he often leaves a trail behind that is attributed by the adults to antisocial behavior by Kyle.Due to his physical state, he can only emerge from the sewers during the Christmas season or he will dry up and die.