The Krusty the Clown Show gets a temporary change due to executive meddling (adding Poochie due to poor ratings/dedicating ten minutes of the show to educational kids' programming due to new FCC regulations).
Someone comments about Itchy & Scratchy's quality after all these years (Bart and Lisa mention that it's getting a little stale/Krusty still finds it funny after 5500 episodes).
"The Itchy & Scratchy & Poochie Show," "The Front," "The Day The Violence Died," "Itchy & Scratchy Land," and "Itchy & Scratchy & Marge": Itchy and Scratchy talk (the first and last cartoons featuring Poochie/"Dazed and Contused" ends with them saying, "Kids, say no to drugs"/the Fritz the Cat version of Itchy & Scratchy/the commercial for Itchy & Scratchy Land's grand opening and Pin-itchy-o/the boring, non-violent Itchy & Scratchy/"The Glass Moan-agerie")
"The Day the Violence Died" only: Bart and Lisa watch a cartoon that's not The Itchy & Scratchy Show (the Schoolhouse Rock parody/The Quick Energy Mattel and Mars Bars Chocobot Hour).
Bart and Lisa work on a TV show (The Itchy & Scratchy Show/Kidz News)
Toyetic cartoons from the 1980s get spoofed (Strongdar: Master of AKOM is a spoof of He-Man and the Masters of the Universe and Action Figure Man having his own episode on how to buy Action Figure Man/The Quick Energy Mattel and Mars Bars Chocobot Hour, which the Generic Female Executive says is barely legal due to its excessive advertising)
The Simpsons have a large pile of mail (death threats from the neighborhood/fan letters for Bart) on the kitchen table.
Lisa strangles Bart in a rage.
"Dog of Death": Bart visits Kent Brockman at his mansion.
"Bart's Inner Child": Milhouse and soiled mattresses (Homer imagines Milhouse crawling out of Fort Adventure, saying, "It smells funny in there."/Milhouse does a news report about how to hide bedwetting).
Bart becomes popular thanks to a performance on live TV.
Kent Brockman's diva-like attitude towards a missing food item (refuses to read the news because someone [Bart] stole his danish/complains about not having grilled cheese)
"Bart Gets an "F"": Bart tries to read something, but gets distracted.
"Bart the Lover": References to tetanus shots (Homer says he needs one after stepping on a nail/Marge tells Bart she needs one as she's running away from Mojo the monkey).
Looney Tunes and Merrie Melodies (Warner Bros. cartoon series): Krusty's line about the Itchy & Scratchy Show having 5500 episodes may or may not be a reference to the Looney Tunes and Merrie Melodies cartoons having 1000 theatrical shorts between 1930 with "Sinkin' in the Bathtub" [while the actual first Warner Bros. animated short is 1929's "Bosko, the Talk-ink Kid," that was a pitch pilot that was never meant to be shown to the public and wasn't released until 2000 when it appeared on an episode of Cartoon Network's anthology show, ToonHeads] and 1969 with the Cool Cat cartoon "Injun Trouble."
The Glass Menagerie (play): The Itchy & Scratchy Show episode "The Glass Moan-agerie"
Mattel and Mars Bar Quick-Energy Choc-O-Bot Hour is a spoof of 1980s and 1990s cartoons (mostly Transformers, all the incarnations of Mighty Morphin' Power Rangers, and the knock-offs and attempts at copying that show, like VR Troopers and Big Bad Beetleborgs) that were derided for being flimsy excuses to sell toys and candy/sugary breakfast cereals to kids.
The James Bond movies: Bart calls Lisa "Octopussy" and acts like a Bond villain.
Del Monte (canned fruit brand): one of Kent Brockman's awards is from Del Monte.
Goofs[]
Bart with his shoe colors reversed
When Bart was pounding on the door of Willie's shack, the colors of his shoes are reversed.
The only way The Itchy & Scratchy Show could have 5500 episodes for as long as Krusty the Clown's show has been on the air (which would have been during the 1970s, since the 1950s had a different format where he wasn't the star and the 1960s had The Krusty the Clown Show as a serious talk show, as seen on "Bart of Darkness") is if the Itchy & Scratchy cartoons used to be theatrical cartoons (similar to the shorts produced by Disney, Warner Bros., Fleischer, Terrytoons, MGM, and others) and new episodes were made after all the theatrical shorts were shown.
Space between the monkey's arm and the cash register
When Apu's monkey first sticks his hand out from behind the cash register, there is a wide gap between the register and his arm, making it look detached from his body.
When Marge complains about Mojo's health, Homer says, "What do you want? His cholesterol's through the roof." The closed captioning replaces, "What do you want?" with "Give him a break, Marge."
The bottom of Bart's microphone missing
When Bart is backing away from Groundskeeper Willie at the dump, the bottom of his microphone disappears for a frame.
