This page contains trivia for "Cartman Joins NAMBLA". Remember, trivia must be factual, provable, and it is always best to cite your source for not-so-obvious trivia. If you would like to dispute a trivia point, please discuss it in the article comments.
This was Dr. Mephesto's last speaking role until the Season Fourteen episode, "201". Since this episode, he had only appeared as a background character. Trey Parker later commented that by this point he and Matt Stone simply didn't find the character funny anymore, and that, in retrospect, they should have made him a member of the real NAMBLA and written him out permanently in this episode.
This is the first episode to feature original music by Scott Nickoley and Jamie Dunlap, who would later go on to produce original music for Season Five and onwards.
A picture of Cartman with Bill Clinton is seen hanging above Cartman's computer.
The "Get it Outa Me" brand abortion pills, ironically, had the picture of conservative Phyllis Schlafly who opposed abortion rights and fought against the Equal Rights Amendment in the 1970's.
This is the 5th episode with Cartman's name in the title.
The John Denver Experience ride is a reference to the death of John Denver in a tragic plane crash.
Cartman's username is "BigBoned", a reference to his belief that he is not fat, but big boned.
The restaurant that appears when Cartman sees Tony316 is the same as the one seen in "Tom's Rhinoplasty", when Stan has dinner with Ms. Ellen.
This was the first episode in 2000 (Season Four), not to have '2000' in the name.
The song playing during the chase scene is Page d'écriture by Yves Montand.
The chase scene is styled after The Benny Hill Show, a risque comedy from the 1970s.
The music playing during the "North Park Funland" commercial is the same music from the commercials for "Wild Wacky Action Bike" and "Alabama Man" on the Season Three episode, "Chinpokomon". Cartman took over the same theme park in "Cartmanland", a future episode.
This episode explains Kenny's resurrections after his constant deaths; his mother gives birth to a baby identical to Kenny and he rapidly ages and retrieves his former memories and appearance. While this theory is inconsistent with "Cartman's Mom is Still a Dirty Slut", in which Kenny reappeared out of thin air in a magical fashion, it is likely the one that was adopted by the writers as it was expanded further in Season Fourteen's Superhero Arc.
The British satellite channel Sky One has banned this episode from showing due to the strong pedophilia references in the main plot (and the subplot being centered on Kenny killing his mom's unborn child). The digital channels Paramount Comedy Channel and VIVA, and terrestrial channel "Channel 4", however, have aired this episode and it does appear on the UK DVD release of South Park's fourth season. 
In the opening scene where the boys are playing the Bill Kurtis-themed version of Monopoly, Bill Kurtis' name is spelled correctly on the board; however, it is spelled incorrectly (as 'Curtis') on the box for the game. This game is seen again in "Up the Down Steroid".
Throughout the episode, Mrs. McCormick's shirt constantly changes from "I'm With Stupid" to "God Bless America".
In the sequence with The John Denver Experience, the soundtrack makes it sound like everyone was screaming, but the McCormicks were the only ones reacting to the bumpy ride.
When Kyle and Stan arrive at the NAMBLA party, the man Kyle is with has on a plaid jacket and gray undershirt, yet when he is sitting at the table, his shirt is black.
Cartman was in the middle of typing his message on the chat room when he started getting messages from older men. It is unknown how they could've known he was a child before he sent the message.
Kenny is killed by an ambulance that is rushing Stuart McCormick to the hospital after he was molested by the pedophiles.