Question: Who are the series creators of the show whose 186th episode is titled "Fishsticks"?

Context paragraphs:
Into the Schwarzwald: "Into the Schwarzwald" is the 12th episode of season 5 of the supernatural drama television series "Grimm" and the 100th episode overall, which premiered on March 11, 2016, on the cable network NBC.  The episode was written by series creators David Greenwalt and Jim Kouf and was directed by Norberto Barba.  In the episode, Nick and Monroe survive the fall and find that they are in the church they were looking for and start searching the treasure.  Meanwhile, chaos emerges in Portland following Dixon's assassination while Renard is given an offer.

Fishsticks (South Park): "Fishsticks" is the fifth episode of the thirteenth season of the American animated television series "South Park".  The 186th overall episode of the series, it was originally broadcast on Comedy Central in the United States on April 8, 2009.  In the episode, Jimmy writes a joke that becomes a national sensation, and Cartman tries to steal the credit while rapper Kanye West is the only person in the country who fails to get the joke, but cannot admit that he does not get it because he believes himself to be a genius.

Revelation (Grimm): "Revelation" is the 13th episode of season 3 of the supernatural drama television series "Grimm" and the 57th episode overall, which premiered on February 28, 2014, on the cable network NBC.  The episode was written by series creators Jim Kouf and David Greenwalt, and was directed by Terrence O'Hara.

4-D (The X-Files): "4-D" is the fourth episode of the ninth season and the 186th episode overall of the American science fiction television series "The X-Files".  The episode first aired in the United States on December 9, 2001 on the Fox network.  It was written by Steven Maeda and directed by Tony Wharmby.  The episode is a "monster-of-the-week" episode, a stand-alone plot which is unconnected to the mythology, or overarching fictional history, of "The X-Files".  The episode earned a Nielsen rating of 5.1 and was viewed by 5.38 million households.  It received mixed to positive reviews from television critics.

South Park (season 13): The thirteenth season of "South Park", an American animated television comedy series, originally aired in the United States on Comedy Central between March 11 and November 18, 2009.  The season was headed by the series creators Trey Parker and Matt Stone, who served as executive producers along with Anne Garefino.  The season continued to focus on the exploits of protagonists Stan, Kyle, Cartman, Kenny and Butters in the fictional Colorado mountain town of South Park.

Alfalfa's Double: Alfalfa's Double is an "Our Gang" short comedy film directed by Edward Cahn.  It was the 186th "Our Gang" short (187th episode, 98th talking short, 99th talking episode, and 18th MGM produced episode) that was released.

Time Out for Lessons: Time Out for Lessons is a 1939 "Our Gang" short comedy film directed by Edward Cahn.  It was the 185th "Our Gang" short (186th episode, 97th talking short, 98th talking episode, and 17th MGM produced episode) that was released.

Wesen Nacht: "Wesen Nacht" is the 6th episode and midseason finale of season 5 of the supernatural drama television series "Grimm" and the 94th episode overall, which premiered on December 11, 2015, on the cable network NBC.  The episode was written by series creators David Greenwalt and Jim Kouf and was directed by Darnell Martin.  In the episode, Trubel gives Nick information about the organization she has been attending and serving.  Nick, Hank and Wu are also investigating a vandalism, murder and kidnapping.  Meanwhile, Nick discovers someone he thought was dead may still be alive.

Coming Back (How I Met Your Mother): "Coming Back" is the second episode of the ninth season of the CBS sitcom "How I Met Your Mother", and the 186th episode overall.

The Wild Hunt (Grimm): "The Wild Hunt" is the 12th episode of season 3 of the supernatural drama television series "Grimm" and the 56th episode overall, which premiered on January 24, 2014, on the cable network NBC.  The episode was written by series creators Jim Kouf and David Greenwalt, and was directed by Rob Bailey.

Supporting paragraphs: Fishsticks (South Park) South Park (season 13)
Answer: Trey Parker and Matt Stone