In Amber Brown, Justin puts underwear on a pumpkin and calls it "Captain Underpants".
In Eye Contact, Johnny's special ed teacher uses Captain Underpants to get him interested in reading. In a book report, he writes, "I loved this book because it's a subject I care about." His teacher is pleased to note that he correctly spelled "booger" and "bowel movement".
SuperMarioLogan: In "Jeffy's Lunch Money!", one of the lies that Black Yoshi, disguised as Jeffy, tells Mario to scam him out of his money is that he's going to the book fair to buy Amelia Bedelia and Captain Underpants books.
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