Continuity mistake: When Mario asks Luigi if he wants King Koopa to know that they and their friends are in Dark Land, his brown hair turns black. This also happens when he and his friends start marching, and when he puts putty in his ears. (00:02:08 - 00:10:32)
Continuity mistake: When Big Mouth asks what King Koopa said, Bully's pink head turns orange. This also happens when he gives King Koopa the Doom Dancer. (00:02:34 - 00:08:42)
Continuity mistake: When King Koopa explains to the Koopalings what he actually said, his yellow eyes turn white. (00:02:39)
Continuity mistake: When Cheatsy is relieved, Big Mouth's purple eyelids turn grey like his head. This also happens when King Koopa tells the Koopalings that the Dry Bones will show them where Mario and his friends went. (00:02:43)
Other mistake: When Mario is breaking some Blocks to find some Super Leaves, some of them remain intact. (00:03:42)
Revealing mistake: After Mario dodges a spike, the screen freezes for a few seconds. (00:04:08)
Continuity mistake: When Big Mouth says that Mario and his friends have a map to the Doom Dancer, Cheatsy's green head turns orange like his body. (00:05:52)
Continuity mistake: When Big Mouth says that the Koopas will be doomed if Mario and his friends get the Doom Dancer, his star disappears. (00:06:03)
Continuity mistake: After Mario and his friends trip on the rope, it disappears. (00:07:07)
Continuity mistake: When Cheatsy pushes Big Mouth aside, the yellow rim on Big Mouth's shell turns white. (00:07:14)
Continuity mistake: When Cheatsy and Big Mouth look at Bully when he catches the Doom Dancer, Cheatsy's black shackles turn green. (00:07:23)
Continuity mistake: When Bully realises that King Koopa cannot hear him, the white rim on his shell turns black like his shackles, and shortly after, his pink shell turns green. (00:08:33)
Continuity mistake: When King Koopa says he can make the entire Mushroom Kingdom dance, one of the orange spikes on his shackles turns white, like his claws. (00:09:05)
Other mistake: When the Doom Dancer starts heading towards King Koopa, and when it falls to the ground, it appears to be heading towards the floor of the Doomship instead. (00:10:53 - 00:11:30)
Audio problem: When the Koopalings watch the Doom Dancer as it falls to the ground, their mouths move, but no sound can be heard. (00:11:31)
Continuity mistake: When King Koopa becomes upset, and the Doom Dancer is destroyed, the orange spikes on his shackles turn white. (00:11:37)
Continuity mistake: When first showing Toad, he has his regular clothes, but in the next shot, he is wearing a suit. (00:01:34)
Continuity mistake: When Mario and his friends are surprised by Princess Toadstool, the pink bowtie and stripe on Luigi's suit turn green like the rest of the suit, while the red linings on Toad's suit turn yellow. This also happens when Princess Toadstool is impressed by Milli Vanilli's exit. (00:01:50 - 00:05:53)
Continuity mistake: When Mario asks if Princess Toadstool's outfit is appropriate, his brown hair turns black. This also happens when Princess Toadstool is impressed by Milli Vanilli's exit. (00:01:54 - 00:05:52)
Continuity mistake: When Mario catches Princess Toadstool, his white shirt briefly turns red while the stripe on his suit disappears. (00:02:07)
