Question: Who becomes a supervillain in the episode that precedes Simpsons Already Did It in South Park ?  

Context articles: The Tale of Scrotie McBoogerballs
Chickenlover
201 (South Park)
Fatbeard
Krazy Kripples
Conjoined Fetus Lady
South Park, Houston
Professor Chaos
South Park Let's Go Tower Defense Play!
Simpsons Already Did It

"The Tale of Scrotie McBoogerballs" is the second episode of the fourteenth season of the American animated television series "South Park", and the 197th overall episode of the series.
 It originally aired on Comedy Central in the United States on March 24, 2010.
 In the episode, the South Park boys write a vulgar book with the sole intention of getting it banned.
 When Stan's parents discover the manuscript, the boys accuse Butters of writing it, then are enraged when it becomes hailed as a literary masterpiece.
"Chickenlover" is the fourth episode in the second season of the American animated television series "South Park".
 The 16th episode of the series overall, it originally aired on Comedy Central in the United States on May 27, 1998.
 The episode was written by series co-creators Trey Parker and Matt Stone, along with David R. Goodman, and directed by Parker.
 In the episode, Officer Barbrady resigns as South Park's only police officer because of his illiteracy.
 Anarchy ensues, just as chickens are mysteriously being molested across South Park.
 Barbrady enlists the help of the boys to learn to read and discover who is molesting the chickens.
 Cartman, meanwhile, masquerades as a police officer.
"201" is the sixth episode of the fourteenth season of "South Park", and the 201st overall episode of the series.
 It originally aired on Comedy Central in the United States on April 21, 2010.
 The episode continued multiple storylines from the previous episode, "200", in which a group of angry celebrities demand South Park produce the Muslim prophet Muhammad.
 In "201", a superhero-like group of religious figures team up to save South Park from the celebrities and their monster Mecha-Streisand, while Eric Cartman learns the true identity of his father.
"Fatbeard" is the seventh episode of the thirteenth season of the American animated television series "South Park".
 The 188th overall episode of the series, it originally aired on Comedy Central in the United States on April 22, 2009 and in the United Kingdom on April 24, 2009.
 It was the mid-season finale, marking the final "South Park" episode for six months.
 In the episode, Cartman misinterprets news reports about piracy in the Indian Ocean to mean the return of the classic era of swashbuckling pirates, and misleads a handful of South Park boys to voyage to Mogadishu to start a pirate crew.
"Krazy Kripples" is the second episode of the seventh season of the American animated television series "South Park", and the 98th episode of the series overall.
 It first aired on Comedy Central March 26, 2003.
 In the episode, Christopher Reeve comes to South Park and Jimmy becomes offended because everyone pays attention to him, so Jimmy and Timmy decide to start a gang called "the Crips", later discovering that there is a real life gang with the same name.
"Conjoined Fetus Lady" is the fifth episode in the second season of the American animated television series "South Park".
 The 18th episode of the series overall, it originally aired on Comedy Central in the United States on June 3, 1998.
 The episode was written by series co-creators Trey Parker and Matt Stone, along with David R. Goodman, and directed by Parker.
 In the episode, South Park Elementary's dodgeball team travels to China to compete for the dodgeball championship, while the town of South Park pays tribute to the school nurse, who is living with conjoined twin myslexia.
South Park is a broad post-World War II development in the south-central area of Houston, Texas, a few miles south of MacGregor Park (from which it gets its name) and directly south of the 610 Loop.
 According to the 2000 Census, the community has a population of 22,282.
 81% of the South Park population is predominately African American, compared to 25% for the city as a whole.
 Houston's Martin Luther King Boulevard runs through the area.
 Reflecting its postwar origins, many streets in South Park are named after World War II battle sites and persons.
 In the 1980s and 1990s crime became a key issue for South Park.
 Katharine Shilcutt of the "Houston Press" said "South Park is an overgrown garden these days, its soil only able to be tilled by the most determined or the most desperate.
 It shows no sign that it will grow again any time in the near future."
"Professor Chaos" is the sixth episode of the sixth season of the Comedy Central series "South Park" and the 85th episode of the series overall.
 It originally aired on April 10, 2002.
 The boys hold a contest to try to find a replacement for Butters, who becomes a supervillain after being fired from the group as the replacement Kenny.
 The show also parodies "The Bachelor."
South Park Let's Go Tower Defense Play!
 is a 2009 video game based on the American animated television series "South Park", released on the Xbox Live Arcade service for the Xbox 360 video game console.
 The game was developed by Doublesix in collaboration with South Park Digital Studios and Xbox Live Productions.
 "Let's Go Tower Defense Play" is a tower defense game, with the added element of being a fast-paced action game as well.
 Thus, players do not only build towers to eliminate destructive forces, but they also have to control multiple characters in order to successfully protect the town of South Park.
 "South Park Let's Go Tower Defense Play!"
 is the first "South Park" video game released after three early titles released between 1998 and 2000.
"Simpsons Already Did It" is the seventh episode of the sixth season of the American animated television series "South Park", and the 86th episode of the series overall.
 It originally aired on Comedy Central in the United States on June 26, 2002.
 In the episode, which continues on from the events of the previous episode "Professor Chaos", Butters thinks up a series of schemes to take over the world, but realizes that each one has already been performed on "The Simpsons".
 Meanwhile, Ms. Choksondik dies and Cartman, Kyle and Stan think that they are responsible.