Blooper: The text from the cutscene after clearing a castle only mentions Mario, even if the castle is cleared with Luigi. The Game Boy Advance version corrects this by mentioning both Mario and Luigi.
Casting Gag: Since Toad was left out of the animated series, production had John Stocker voice the replacement, Oogtar.
Screwed by the Network: NBC gave this treatment to the cartoon's entire run. Viewers relying on word-of-mouth rather than commercials just to catch a new episode was the first straw. Being produced on a smaller budget than The Adventures of Super Mario Bros. 3, and thus limiting the episodes to one segment in each Captain N episode, instead of two with 3, was the second straw. The last straw, however, came when NBC halted production of the series without any prior announcement, then canceling it and its fellow NBC cartoons altogether as part of NBC's take-down of their Saturday morning block and replacement by teen-oriented TNBC. Its time slot was then occupied by local news.