Trivia: Maggie scans as $847.63 in the supermarket at the beginning (not NRA4EVER, as Troy Maclure asserts in 3F31 "The Simpsons 138th Episode Spectacular), the price it costs to feed and care for the average American baby every month.
The Scorn of the Star Sapphire! - S3-E5
Trivia: After freeing Miss Taylor from the grip of Star Sapphire, Green Lantern encases her in a green energy box and flies her away. The box is shaped almost exactly like a shuttle craft from Star Trek. (00:15:50)
Trivia: An R2-D2 with a wig is visible on Junior's shelf. A nod to Cleveland playing R2-D2 in the Family Guy Star Wars trilogy.
Trivia: The episode starts off with Dee Dee eating scraps, while Marky looks over stuff. Later on, Marky found what seems to be an Identity Card that belongs to Joey. Here, the card shows that Joey's birthday is on June 15th, 1991. (00:00:14)
Suggested correction: Is there some sort of special offscreen significance to this birthday? Because I don't see how this constitutes trivia if it's blatantly shown onscreen.
Batman VS Iron Man (DC VS Marvel) - S4-E10
Trivia: The car that Batman slides over when avoiding Iron Man's blasts is the same car from the mini game in Street Fighter II, where players would beat up the car and tear it apart as fast as possible for more points. (00:04:43)
Kiseki no fukkatsu! Yuyo no cosmo - S1-E5
Trivia: When Seiya opens his eyes hearing Miho calling his name, behind her in the audience a particularly bored animator decided to put in some silly characters, including the Tin Man, the Lion and a girl with the look of Dorothy from the wizard of Oz. (00:19:20)
Superskrull - S1-E7
Trivia: The Godzilla parody movie that the Skulls are watching at the beginning of the episode says it is presented by Roger Shnorman. This is a reference to cult-film director Roger Corman, who himself was an executive producer on a Fantastic Four film that was made around the same time this series aired, but was deliberately never released. (00:01:30)
Trivia: The fight between Satan and ManBearPig is similar to the fight between Hulk and Abomination at the end of The Incredible Hulk.
Love and Cheese / Weighing Harold - S4-E7
Trivia: In 'Weighing Harold', when Arnold is in the comics store, there are comics in the background referencing other Nickelodeon shows, "Catdog" and "Spongebob Squarepants." The former had aired almost exactly a year before this episode did ('Catdog' premiered on 4/4/1998 and this episode on 4/7/1999). The later aired about a month after this episode.
Trivia: One of the images in Gambit's mind-scan is of fellow Marvel Comics superhero Ghost Rider. (00:07:45)
The Red Sea Sharks: Part 1 - S3-E1
Trivia: The Emir's hideout is strongly based on the Al-Khazneh temple at Petra. (00:19:25)