Revealing mistake: When Mario and his friends start running to the drainpipe, Drainotto runs in place for a few frames. In the same shot, Toad briefly runs in midair, and shortly after, he is layered underneath a rock. (00:13:18)
Continuity mistake: Throughout the episode, the white spikes on King Koopa's tail are coloured orange instead.
Revealing mistake: When Mario shoots fireballs at Koopa Khan and his army, a fire is layered over a Snifit. (00:12:48)
Continuity mistake: When Mario and his friends look at Koopa Khan while on the bridge, Princess Toadstool does not have a cape. But when she and her friends fall after Koopa Khan destroys the bridge, one appears. (00:10:49)
Continuity mistake: When Drainotto says that he could make an underground river with some help, the number of fingers he has on each hand changes from five to four. (00:07:46)
Audio problem: When Mario and Luigi are excited to return to Brooklyn, Mario's mouth moves, but no sound can be heard. (00:07:26)
Continuity mistake: When Toad puts his cap back on, his torso changes from skin-colour to blue, while his trousers change from blue to skin-colour for a few frames. (00:04:59)
