Continuity mistake: After Toad says that he and his friends are surrounded, the white spikes on El Koopitan's tail turn orange. (00:12:04)
Continuity mistake: When Zero walks up to Princess Toadstool after fighting the Koopa Troopas, the bathtub's levers and showerhead disappear. In the same shot, Princess Toadstool's brooch changes from being yellow with a blue centre to blue with a yellow centre. (00:07:30)
Continuity mistake: When El Koopitan throws some cacti at Zero, the green rings around the spikes on his shell turn orange, like the spikes themselves. (00:08:51)
Continuity mistake: Throughout the episode, Koopa Troopa's green hands turn yellow several times.
Mario and the Red Baron Koopa - S1-E30
Continuity mistake: When the Lakitu starts throwing Spiny Eggs at the Mushroomers, its green snout turns yellow, like its goggles. (00:04:59)
Hooded Robin and His Mario Men - S1-E25
Continuity mistake: When Mario and his friends look at the hallway leading to the Coins, Hooded Robin's red wings turn yellow. This also happens when Princess Toadstool takes a curtain. (00:11:19 - 00:11:47)
Hooded Robin and His Mario Men - S1-E25
Continuity mistake: When Princess Toadstool takes a curtain, Hooded Robin's red head turns yellow, like his beak. (00:11:47)
Hooded Robin and His Mario Men - S1-E25
Continuity mistake: When some Koopa Troopas surround Mario and his friends after they are caught in a net, they have blue hoods. But when one of them mistakes them for Hooded Robin, their hoods turn green like their bodies. This also happens when they are told to retreat. (00:03:19)
Continuity mistake: When King Koopa tells Fryguy to prepare the Lava Machine, the white spikes on his tail turn orange. This also occurs when he approaches the boat. (00:10:06 - 00:14:50)
Koopenstein - S1-E21
Continuity mistake: In Mouser's first appearance, he does not have a laboratory coat on, but in the next shot, one appears. (00:03:46)
Two Plumbers and a Baby - S1-E17
Continuity mistake: When Mario says that they have to free the children, his black sideburns turn red, like his cap. (00:06:43)
Two Plumbers and a Baby - S1-E17
Continuity mistake: Normally, the castle has a door, but when King Koopa says that the infants will have to do all of his chores, the door disappears. This also happens when Luigi is trying to listen in on what is happening inside the castle. (00:06:05 - 00:06:27)
Continuity mistake: After Princess Toadstool is captured by Blackbeard Koopa, the Koopa Troopa holding her left arm has a blue bandanna. But when Blackbeard Koopa says that she did not come willingly, the bandanna turns red. (00:07:53)
Continuity mistake: When Captain Clump says that Blackbeard Koopa bothers pirates, his purple trousers turn red. (00:07:59)
Continuity mistake: When the Mario Bros. are revealed, Mario is wearing the tank top of his disguise, but in the next shot, he is wearing his normal clothes. (00:15:18)
Continuity mistake: Normally, Blackbeard Koopa's ship is blue, but when Princess Toadstool is on his ship, it turns brown like Captain Clump's. This also happens when it is docked at his fortress. (00:08:29 - 00:11:17)
Continuity mistake: When Butterfingers urges Princess Toadstool to stay, her leg bracelet disappears. This also happens when they run away from King Koopa. (00:12:14 - 00:14:34)
Continuity mistake: Throughout its appearance, the grey sideskirts on Mario and his friends' car turn brown like the rest of the car several times. (00:03:44 - 00:09:06)
Continuity mistake: Throughout the episode, the white spikes on King Koopa's tail are coloured orange instead.
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)
