Continuity mistake: As Yoshi and his friends are about to escape Kootie Pie's lair, Mario is to the right of the Mama Fireplant, while Luigi is to the left. But in the next shot, they switch places. In the same shot, Yoshi is colored blue as though he was stung by a porcupinefish despite never stepping on one. (00:11:09)
Revealing mistake: When Mama Fireplant says, "It is great to be back," Mario is overlapping a cave person. (00:11:17)
Continuity mistake: When Mama Fireplant thanks Yoshi for saving her, part of her blonde hair turns red like her head. (00:11:22)
Audio problem: Several times throughout the episode, characters' mouths move without any dialogue being present.
Continuity mistake: Throughout the episode, Mario and Luigi switch between having four fingers on each hand to five.
Continuity mistake: When Kooky is climbing a tree, his orange tail turns white, like the rim of his shell. (00:02:09)
Continuity mistake: When Kooky lifts the mask of his disguise, its white tooth turns brown, like the rest of the mask. (00:02:17)
Continuity mistake: After Luigi asks how many more wheels he and Mario have to make, his black mustache turns the same color as his skin. (00:02:26)
Continuity mistake: When Luigi and Yoshi start fighting over the stick, the black "L" on Luigi's cap turns green. (00:03:57)
Audio problem: After Yoshi falls off Luigi, he speaks, but his mouth does not move. (00:04:32)
Revealing mistake: When a cave person drives out of the factory, he overlaps onto a house. (00:05:38)
Audio problem: When Kooky says that he will use the Mega Mechanasaur to conquer the world, his mouth does not move. (00:07:25)
Continuity mistake: When the Mega Mechanasaur starts breaking into Dome City, its dark-blue shoulders turn light blue. In the same shot, the cover underneath it disappears. (00:07:37)
Continuity mistake: Throughout its appearance, the colour of the Mega Mechanasaur's levers changes. (00:07:45 - 00:11:26)
Continuity mistake: When King Koopa and Kooky board the Mega Mechanasaur, the brown borders around the cockpit turn blue. (00:07:48)
Character mistake: When King Koopa runs away from Kooky's machine, he says for it to let him go before he is grabbed. (00:08:13)
Other mistake: When Kooky's machine throws King Koopa into the cockpit, the top is transparent. (00:08:18)
Audio problem: When Ooga knocks on the door to Dome Castle, he knocks once, but the sound of knocking can be heard twice. (00:08:33)
Continuity mistake: When Mario and Luigi are in the lava pit, the pizza Luigi is cooking changes direction between shots. (00:08:52 - 00:09:22)
Continuity mistake: When Luigi asks Mario about the message, Princess Toadstool is sending, Mario's blue shirt turns red, while the stripes on his and Luigi's gloves turn the same color as their shirts. In the same shot, Luigi's mouth initially is not moving when he speaks. (00:09:11)
