Cornwallis Hankey is one of Mr. Hankey's children. He is presumed very smart, but he is conflicted with being a poo. He appears in the Season Four episode, "A Very Crappy Christmas" and South Park: The Stick of Truth.
Cornwallis is a talking piece of excrement with an orange and blue hat, glasses, gloves and an orange scarf.
Cornwallis is deeply conflicted by being a poo, he does not see the bigger picture. His father, Mr. Hankey, sings him a song about it but later reveals he only did so because he wanted to "stop his bitchin'".
Cornwallis plays a minor role in Mr. Hankey's quest Dropping the Kids Off. The New Kid must rescue him from hobos, who are using him for an entertainment "Shit Show", and return him to his parents.
- "A Very Crappy Christmas" - First appearance. Briefly loses his Christmas spirit until Mr. Hankey sings to him "Circle of Poo".
- "I'm a Little Bit Country" - Seen in the crowd of people along with the rest of his family.
- Cornwallis sings with the voice of ex-Temptation Louis Price in "Circle of Poo", but with the high-pitched tones that Trey Parker gives to Mr Hankey when he sings "Santa Claus is On His Way" when on display to the hobos in the game.