Trivia: The date for the newspaper Professor Utonium and Hobo Jojo read is Wednesday, July 3, 2002. That's the day the movie was released into theaters.
Trivia: In the biblical book of Jonah, there is actually no whale that swallowed Jonah. The "whale" is a mistranslation of the Hebrew word for a big fish by the translators of the King James Version. Because of the prominence, respectability, and the wide distribution (it is in the public domain in the U.S., but not in the U.K.) of the King James translation over modern translations like the New International Version, the "whale" is what most Bible readers think of the sea creature that swallowed Jonah.
Trivia: Did anyone else pick up the Indiana Jones and the Temple of Doom rip-off/reference? When Mathyus is in the harem of Lord Memnon and the archers come in, he cuts the gong off the wall and runs behind it as a shield, while the guards shoot at it in vain. He then busts out the window and jumps out of it.
Trivia: At the end of the movie, when Mrs. Watchitt is standing in the doorway, there is a picture of H.G. Wells hanging on the wall behind her.
Trivia: This trivia happens in the scene where the Littles hire the plumber to find the ring. Nearly everybody would know that the plumber is the same actor who plays Robert in "Everybody loves Raymond" series. Well, notice his name tag: "ROB".
Trivia: There were no scripts used in this movie, whatever Steve and Terri said was off the top of their heads. All stunts were performed, just like the TV show, by Steve himself.
Trivia: Craig Bartlett, the creator of the nickelodeon show that the movie is based on, is the voice of Murray the bus driver, and others, in the movie.
Trivia: Director Shawn Levy has a cameo during the "Whitaker and Fowl" party after the premiere, as the first guest bashing Marty's movie. (00:52:50)
Trivia: The poem Lucy reads to Ben at the campsite are lyrics to the Britney Spears' song, "I'm Not A Girl, Not Yet A Woman."
Suggested correction: I'm not really sure this would count as trivia considering how obvious it is. Ben even turns it into the song at the end of the movie.