The final episode to air before the release of South Park: Bigger, Longer & Uncut (1999), which was released exactly one week after the airing of this episode.
Mr. Adler is based on a teacher Matt Stone had in elementary school, whose name was bleeped multiple times on DVD commentary.
Trey Parker and Matt Stone said that scenes they had to cut from South Park: Bigger, Longer & Uncut (1999) would be recycled in the series. Here's one instance a scene appears in both: the kids coming up over a hill in the playground for the fight between Tweek and Craig is similar to one where La Resistance comes up over a hill in the heat of battle in the movie.
Before the fight, Tweek is dressed in the same red and yellow boxing robe as Sylvester Stallone in Rocky (1976).