Mailman

Mailman Timmy was seen as an introductory character in the Season Three episode, "Mr. Hankey's Christmas Classics".

Background
Mailman Timmy is the opening narrator who parodies the mailman character Special Delivery Kluger in Rankin and Bass' Santa Claus is Coming to Town stop motion animation Holiday special.

The Mailman sings the Mr. Hankey, the Christmas Poo (song) with various children of South Park in the first song of the Third Holiday special.