Professor Chaos

He does minor things like swapping two soup meals at a Bennigan's restaurant, and stealing erasers from Ms. Choksondik during class.

While Professor Chaos and General Disarray try to destroy the planet, Kyle, Stan, and Cartman pick six finalists to be their friend: Token, Timmy, Jimmy, Tweek, Towelie, and Pip.

The decision cuts off into a cliffhanger, where a narrator asks three questions: "Will Professor Chaos' latest plot succeed and be the final undoing of Earth?

And which of these South Park residents (Chef, Mr. Garrison, Jimbo, Officer Barbrady, Ms. Choksondik, and Mayor McDaniels) was killed and will never be seen again?"

[1] "Professor Chaos," along with the sixteen other episodes from South Park's sixth season, were released on a three-disc DVD set in the United States on October 11, 2005.