Revealing mistake: When Koopa football players start throwing baseballs at Mario, a block is layered over one of them. (00:08:57)
Audio problem: When Big Mouth is hit by a pie, the audio is unsynchronised. In the same shot, Big Mouth's body is missing. (00:05:28)
Continuity mistake: When Princess Toadstool throws the Fire Flower to Mario, the underground is depicted at ground level. (00:08:34)
Continuity mistake: When King Koopa says, "The cave people will become food for his dinosaurs," his cream claws turn yellow like the spikes on his shackles. (00:03:03)
Continuity mistake: When Mario jumps on a Mechkoopa, his black eyebrows turn brown. (00:10:26)
Continuity mistake: In this episode, the bottom of King Koopa's feet changes from green to yellow.
Continuity mistake: When Luigi is giving some ice cream, his white gloves turn the same color as his skin, while the stripes turn the same color as his shirt. (00:11:08)
Continuity mistake: When Mario sees Princess Toadstool in the Koopa Clown Car, his white gloves turn the same colour as his skin. (00:10:18)
Continuity mistake: When Mario falls into the cage, King Koopa disappears. (00:07:29)
Revealing mistake: When Yoshi says the circus is more fun than tennis, a line on his underbelly is layered on his left arm. (00:04:17)
Continuity mistake: When Mario rips the tent, the lock on the cage faces away from it, but in the next shot, it faces towards it. When Luigi, Yoshi, and the cave people cheer for Mario, the lock returns to its original orientation. (00:10:12)
Continuity mistake: When Mario goes out of bounds to hit the ball, he is briefly layered behind Yoshi. In the same shot, the white stripes on his gloves turn blue like his shirt. (00:03:16)
Revealing mistake: After Mario jumps over the statue, he is layered in front of and behind the wall. (00:09:14)
Revealing mistake: When Mario runs past Big Mouth and some Koopa Football Players, he is layered underneath them. (00:09:43)
Revealing mistake: When Mario jumps onto a moving platform, he passes through it. (00:09:29)
Revealing mistake: When Mario suggests grace to the Dino-Torch, his moustache overlaps on it. (00:08:18)
Revealing mistake: When Mario and Luigi realise that the clowns are dinosaurs, part of Mario's mouth briefly detaches from his face. (00:06:35)
Continuity mistake: When Luigi explains that ball boys pick up balls instead of eating them, the number of fingers he has on each hand changes from five to four. This also happens when Mario says they should check out the circus, along with Mario. (00:02:02 - 00:04:22)
Revealing mistake: When Mario and his friends reach Kastle Koopa, a railing is layered over Mario. (00:04:07)
Continuity mistake: When King Koopa is first seen in a Koopa Clown Car, the rim around it is white, but in the next shot, it is green. (00:02:45)
