Guest Stars Trey Parker voices Butters Stotch Trey Parker voices Mr. Mackey Trey Parker voices Clyde April Stewart voices Wendy Testaberger Trey Parker voices Jimmy Valmer Trey Parker voices Timmy Burch Trey Parker voices PC Principal Jessica Makinson voices Heidi Turner Trey Parker voices Nathan Laylo Incognegro voices Nichole Daniels Trey Parker voices Mimsy