The events in "Friday the 13th" takes place two weeks before those of "Arthur Loses His Marbles."
When Grandma Thora refers to the marbles tournament in New Jersey, she's referring to the annual National Marbles Hall of Fame and National Marbles Tournament in Wildwood, New Jersey.
Arthur brought a sleeping bag to sleep over Buster's house, but Buster has a bunk bed.
Arthur and his friends must really have a problem with sheep, because "Crushed" is the second time that one has been portrayed as a villain. The first was in "Sue Ellen Gets Her Goose Cooked," when Buster thought that FOURHAND451 was a mutant sheep.
When he found out Sally's high score in "Dark Bunny VI," Arthur fidgets with glasses when saying that his score is higher. As seen in previous episodes, this unconscious tell of Arthur's indicates that he's lying.
In "Crushed," Sally and Arthur play "Dark Bunny VI," but Dark Bunny is a new show, a very recent spin-off of Bionic Bunny. It's not possible that six games were created that fast.
In "The Good Sport," D.W. says that she never meets anyone famous, but she has met Mister Rogers, the President of the United States, Yo-Yo Ma, and Joshua Redman.
Didn't D.W. have an allowance on "DW Tricks the Tooth Fairy"?
As George takes Wally out of the box, the first thing he mentions (pretending to be Wally) is how he got Wally back from DW after she mishandled the doll.
In "Citizen Frensky," The Brain says that kids working is against Child Labor Laws. Yet, The Brain is often seen working in his parents' ice cream shop.
D.W. is 4 years old and Vicita is 3½, but there is a huge difference between the two of them. There's a extreme height difference and D.W. is rather more mature.
Since "amigo" is Spanish for friend or pal, Pal and Amigo have the same name.
"The Boy Who Cried Comet!" and "Arthur and Los Vecínos" have something in common. They both feature a character who is annoyed by another character because they want to gain information. So to get that person off of their back, they give them a book. i.e., The Brain giving Buster the astronomy book, and Alberto giving Arthur the Spanish-to-English dictionary.
Buster uses his special telescope without ever plugging it in. A standard telescope would not require electricity, but one of the type that Buster uses would definitely require some sort of power supply.
Arthur should not have been able to find "te tengo" in a Spanish-English dictionary. "Tengo" is a conjugation of the verb "tener" (to have) and Spanish-English dictionaries do not have conjugations in them.
DW says she's 4 in this episode, but she turned 5 WAY
before this episode was aired.
In this episode we see that Mr.Sipple lives next next door to Arthur, but in a previously episode Mr.Sipple said he left his bathwater on and ran down the street.
The Tower of Cows game doesn't come with a game board, but yet it has game pieces.
When Vacita starts jumping, the trampoline pushes in too much, but then it stops.
When Binky gets sent to Mr. Haney's office, Mr. Haney says he has no idea what Binky's name is, and he starts to rifle through his student file drawer. But the "list of offenses" that Ms. Krasny wrote has Binky's name on it, in front of all the offenses.
Also, if he doesn't know Binky's name, it shouldn't be possible for him to look for his file.