Revealing mistake: When the hidden chamber is revealed, the background is that of the chamber instead of the basement. (00:07:44)
Revealing mistake: When Princess Toadstool and Toad are running to Princess Toadstool's castle, they briefly appear frozen. (00:06:33)
Revealing mistake: When everything is returned back to normal, both times, a bowl appears from thin air, while a Mushroomer by a clothesline freezes. (00:03:17 - 00:11:08)