Other mistake: On the "Mario's Greatest Movie Moments" DVD of this series, from the main menu, go into the trivia game. The fifth question asks you about the Super Mario Bros. Super Show episode 'Count Koopula.' It asks you "What's room number that the Mario Bros. were put into in Koopula's Castle?" It's supposed to say "What's THE room number that the Mario Bros. were put into in Koopula's Castle?"
Toujou! Eien no mayoigo Ryouga - S1-E7
Other mistake: When Ryoga is told he is in Shikoku, in the windblown view you can see the crowd being more stretched out than when he hightails. Also, the guy with the yellow shirt is drawn with bulging eyes instead of glasses. (00:04:40)