Continuity mistake: When Luigi and Toad run through the halls, the Sledge Bros. shake the floor. Toad's purple shoes turn skin-color. This also happens when the Flame Chomps fall out of a window. (00:07:17 - 00:09:44)
Misadventures in Babysitting - S1-E13
Revealing mistake: When Junior's mother enters the living room, as she is leaving, Mario is briefly layered over some stairs. (00:02:23)
Super Koopa - S1-E26
Revealing mistake: When Mario points to Raccoon Koopa for the captain, the background is the sky instead of the submarine, while part of the background is coloured in like the helicopter. (00:03:55)
Continuity mistake: After Luigi gets his periscope, the letters on his and Mario's caps are white instead of green and red, respectively. (00:05:08)
Continuity mistake: After King Koopa says that he should take over Sky Land as well, his yellow eyes turn green. (00:08:43)
7 Continents for 7 Koopas - S1-E22
Continuity mistake: When the Koopalings look at the engine, Kootie Pie's shoes disappear. (00:01:33)
Life's Ruff - S1-E20
Continuity mistake: When King Windbag is turned into a dog, his purple shoes turn brown. (00:02:34)
Other mistake: King Koopa is able to stick himself out of one of the windows on the Doomship, despite it being closed. (00:08:52)
Crimes R Us - S1-E19
Continuity mistake: When King Koopa introduces himself, Clyde's yellow shoes turn brown. (00:02:07)
Crimes R Us - S1-E19
Revealing mistake: When Clyde asks why King Koopa broke him out of prison, he is layered over some controls. (00:01:49)
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)
Revealing mistake: When Kootie Pie says that she wants to see Milli Vanilli, she is briefly layered over King Koopa. (00:03:21)
Misadventure of Mighty Plumber - S1-E12
Continuity mistake: When King Koopa says that Mario and Luigi are here, the orange spikes on his shackles turn red, while his left nostril disappears several times. (00:05:07)
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: After Kooky says that Mario is their prisoner, the orange heads of the Hammer Bros. turn cream-coloured. (00:05:31)
Continuity mistake: When Mario is brainwashed, his white teeth turn skin-colour. (00:06:01)
Continuity mistake: When Big Mouth says that his and Kootie Pie's wands will make him feel better, the yellow rim of his shell turns brown. (00:03:07)
Toddler Terrors of Time Travel - S1-E8
Revealing mistake: When Kooky says that he and King Koopa are travelling too far back in time, his device is layered over some controls, while Mario's black moustache briefly turns brown. (00:03:10)
Toddler Terrors of Time Travel - S1-E8
Continuity mistake: When the elderly lady reveals King Koopa and Kooky, Kooky's right arm changes from orange to green. (00:05:11)
Toddler Terrors of Time Travel - S1-E8
Continuity mistake: When King Koopa tells the young lady to leave the plumbing to him and Kooky, he is layered over the bathtub. (00:07:03)
