Jeff and Erik make a cameo appearance in this episode, they appear on the picture of Mandie.
Timmy doesn't turn off the bathroom tap when he done washing his hands.
Of Mice and Men and The Grapes of Wrath are based on real books of the same name.
When the locker says Mr. Chocolate its a parody of Mr. Tastee from the cult following television series The Adventures of Pete and Pete.
Cosmo eating everything that's made of food (Cosmo: That's not a HOT dog! That's a DOG dog!).
Timmy and Mr. Crocker tapping a wand against their own head and murmer something (Crocker: Immy, Immy, Immy.... NOPE!) while changing their heads into something else (Pencil, Fish, Cheese) without realizing it.
Characters saying the "Find It" book is for three-year-olds.
Cosmo and Wanda disguise themselves as trash cans despite the fact that they don't have their wands. Although it could be that they transformed themselves as stated in The Gland Plan.
Why would Mark say that Mandie's "super hot"? Even though she's considered beautiful by human standards, she's considered ugly by Yugopatamian standards.
When the Library is zoomed out, the door, the hall, and the clock are back to their original format rather than the cookie, the milk and the graham crackers.
The puzzle book is constantly stated to be for 3 year olds, but Mandie said that an apple was a bomb, a bomb is a more dangerous weapon than something like a sword so the puzzle book shouldn't have that because it is for 3 year olds.
When Mr. Crocker shouts "Fairies!" in this episode for the final time, original captions say HEY!, but somehow, Mr. Crocker sometimes gets closed captioning errors in the series.