Saddam Hussein ... himself
A funny "disclaimer" reads: "Conan O'Brien, Brooke Shields, President Clinton, The Baldwin Brothers and Winona Ryder did not authorize the use of their names or contribute any performances to this motion picture"
The mountain in the Paramount logo dissolves into a mountain located in the landscape near South Park.
The post-credits scene in this movie is seen AFTER the closing logos, instead of before like most other post-credits scenes.
After the credits, Kyle's little brother mumbles, "Guys up there is hurted," referring to the scene of The War Between America And Canada, then eats a rat, while left in the attic waiting for his family to return.
In the end credits, both Satan (Trey Parker) and Saddam Hussein (Matt Stone) are credited as playing themselves.
All songs are shown to be performed by the characters from the movie
There are no opening credits, save for the title.