Mario and the Red Baron Koopa - S1-E30
Audio problem: In several shots during the beginning of the episode, King Koopa's mouth moves but no sound can be heard. (00:05:27 - 00:06:17)
Hooded Robin and His Mario Men - S1-E25
Continuity mistake: When King Koopa asks Hooded Robin, "How does it feel to be in his dungeon?", the spikes on his shackles disappear. (00:08:41)
Two Plumbers and a Baby - S1-E17
Revealing mistake: When Mario and Luigi look at what King Koopa is doing with the infants in the castle, one of the infants is laid out of the castle instead of inside it, and shortly after, a tricycle is laid over another tricycle. (00:06:31)
Elvis Lives - S1-E39
Continuity mistake: When Luigi inflates one of the tyres on their car, he is by the car, but when the tyre explodes, he disappears. (00:12:20)
Elvis Lives - S1-E39
Continuity mistake: When Princess Toadstool says that Kool Koopa has trouble, Kool Koopa's red car turns green. (00:12:52)
Elvis Lives - S1-E39
Continuity mistake: When the shoes say that Elvin will be unfrozen if Princess Toadstool puts them on him, Elvin's brown socks turn blue like the shoes. (00:08:51)
Elvis Lives - S1-E39
Revealing mistake: When Kool Koopa tells the Goombas to get Mario and his friends, a building overlaps one of the Goombas. (00:05:17)
Revealing mistake: After Alley Koop orders his army to attack, he is briefly layered over a Koopa Troopa. (00:04:01)
Revealing mistake: When Luigi trips over a bone, the bone is layered over him. (00:03:30)
Audio problem: Despite the fortress being made of stone, when the Hammer Bros. hit one of its bricks, it makes the sound of metal. (00:06:42)
The Koopas are Coming! The Koopas are Coming! - S1-E35
Continuity mistake: When Mario says that he and his friends can attack Redcoat Koopa from behind, his head is layered behind the bubble he is in. (00:11:59)
The Koopas are Coming! The Koopas are Coming! - S1-E35
Revealing mistake: When George Washingtoad slides away from his tent, he briefly overlaps the stove and one of his guards. (00:07:20)
The Koopas are Coming! The Koopas are Coming! - S1-E35
Continuity mistake: When Mario cools himself down in the bucket of water, there is no puddle nearby, but when he carries Luigi over to the stove, one appears. (00:06:59)
The Koopas are Coming! The Koopas are Coming! - S1-E35
Continuity mistake: When Mario jumps into the bucket of water, his left arm changes from blue to skin colour. (00:06:31)
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)
Revealing mistake: When Mario says that it does not look good for him and his friends, a Koopa Troopa's foot overlaps the sombrero chariot. (00:06:46)
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)
Revealing mistake: In the live-action segment, when E.C. arrives, the basement shakes but the objects remain stationary, revealing that the shaking was achieved by shaking the camera. (00:02:10)
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)
Revealing mistake: When Rappin' Koopa looks through his telescope, part of the background can be seen at the edges of the screen. (00:05:08)
