Toddler Terrors of Time Travel - S1-E8
Continuity mistake: When King Koopa tells Kooky to bring more items to clog the drain, Kooky's orange gloves turn white like King Koopa's. (00:07:52)
Toddler Terrors of Time Travel - S1-E8
Continuity mistake: When the young lady says that plumbing is too dangerous for Mario and Luigi, Toad's purple briefly turns skin-colour. (00:06:14)
Reign Storm - S1-E7
Revealing mistake: When King Koopa and Kooky spy on Mario and Luigi near the pipe, Mario's feet are missing. In the same shot, King Koopa is behind the pipe, but in the next shot, he is in front of it. (00:01:30)
Reign Storm - S1-E7
Continuity mistake: When King Koopa puts the lei on Kooky, the white spikes on his tail turn orange. (00:06:34)
Reign Storm - S1-E7
Revealing mistake: When Mario and Luigi follow the Robot Princess inside their house, Mario is briefly layered over a mushroom. (00:06:10)
Revealing mistake: When King Koopa leaves to prepare himself for the ceremony, his right arm passes through a door. (00:08:09)
Revealing mistake: When Princess Toadstool says that she would never sign her kingdom over to King Koopa, even with the threat of Bob-ombs, she is holding thin air. (00:05:21)
Continuity mistake: After Mario says that he is surprised that King Koopa is surrendering, Toad's blue trousers turn brown. (00:01:01)
Other mistake: When Mario and Princess Toadstool enter the dungeon, the hatch they enter through briefly appears closed, but they still enter it regardless. (00:04:16)
Princess Toadstool for President - S1-E5
Revealing mistake: When the Mushroom People cheer for King Koopa after he says that there will be more nice things if they elect him as their ruler, a Mushroomer's face is not fully coloured in. (00:04:29)
Princess Toadstool for President - S1-E5
Continuity mistake: When Kooky says that King Koopa would never win the election unless he is under the effect of the Nice Guy Potion, his tooth disappears several times. (00:03:38)
Mind Your Mummy Mommy, Mario - S1-E3
Continuity mistake: In his initial appearance, Mario's black hair, eyebrows, and mustache turn brown. In the same shot, his bed layered over another bed. (00:02:17)
Princess Toadstool for President - S1-E5
Continuity mistake: When King Koopa says that he has never been nice, one of his white nails turns green like his body. This also happens when he clears his eyes after being sprayed by Kooky's Nice Guy Potion. (00:03:02)
Mind Your Mummy Mommy, Mario - S1-E3
Revealing mistake: Before Hip and Hop sigh, their eyelids are not fully coloured in. (00:01:18)
Super Koopa - S1-E26
Revealing mistake: When Mario shoots a fireball at King Koopa, as he falls into the river, the ripples in the water are misplaced. (00:09:15)
Continuity mistake: When Mario meets up with Luigi in the cockpit, the yellow eyes on Luigi's frog suit turn white. (00:10:12)
Super Koopa - S1-E26
Continuity mistake: When Mario becomes Fire Mario for the first time, his mustache changes from black to brown several times. (00:09:09)
Super Koopa - S1-E26
Revealing mistake: When King Koopa turns into Super Koopa for a second time, Kooky is layered over him. In the same shot, Kooky's left leg changes from brown to yellow. (00:08:08)
Super Koopa - S1-E26
Continuity mistake: Whenever the camera zooms in on the pendant as it is about to explode, King Koopa disappears. (00:11:12)
Super Koopa - S1-E26
Continuity mistake: When the Mario Bros. deflect a fireball back at Super Koopa, Luigi's hair in his normal form changes from black to brown, like Mario's. (00:10:08)