Revealing mistake: When Karate Koopa catches Princess Toadstool and Toad trying to escape, his legs and part of Princess Toadstool's dress are cut off for a few frames. (00:13:49)
Revealing mistake: When Mario and his friends laugh at the end of the episode, Mario appears to be standing in midair. (00:16:54)
Revealing mistake: When the female monkey grabs Marzan, he appears out of thin air. (00:08:35)
Little Red Riding Princess - S1-E44
Revealing mistake: When Gramma removes the lock from the door, it passes through its holder. (00:07:20)
Revealing mistake: When Pronto starts dodging the Koopa Troopas, he briefly appears to be floating in midair. (00:10:51)
Revealing mistake: When the camera pans across the front of Double Cross Ranch, the edge of an animation cel is visible. (00:13:51)
Escape from Koopatraz - S1-E46
Revealing mistake: When Mouser tells everyone to rise for Judge Koopa, he is layered over a wall. (00:03:19)
Escape from Koopatraz - S1-E46
Revealing mistake: When Warden Koopa tells Mouser to show Mario and his friends their cells, his foot is layered over a Koopa Troopa. (00:06:47)
Revealing mistake: When the first fight starts, the Bloober disappears into thin air. (00:04:52)
Revealing mistake: After Luigi tells Mario to wait for him, he does not jump on one of the Koopa Troopas, but the Koopa Troopa reacts as though he did. (00:07:46)
Revealing mistake: When Mario heads to Luigi in one of the coaster cars, the car is initially to the side of the track instead of on it. (00:07:47)
Revealing mistake: During Princess Toadstool and Toad's picnic, the tray of bread is layered over Princess Toadstool twice. (00:09:46)
Revealing mistake: When a front view of King Koopa running down a street is shown, he clips through a building. (00:15:25)
Revealing mistake: In the live-action segment, when the glass in Luigi's hand shatters from Mrs. Gammliss' singing, Luigi can be seen actually pressing the glass together to make it break instead. (00:17:59)
Raiders of the Lost Mushroom - S1-E49
Revealing mistake: When Indiana Joe saves Luigi, he is layered over a mushroom. (00:05:05)
Revealing mistake: When the Mushroomers are scared of the crocodiles entering the town, the crocodiles freeze for a few frames in the transition to the next shot. (00:05:04)
Revealing mistake: In one shot of the crocodiles chomping the general store down, some of the pieces of wood freeze in midair. (00:06:41)
Revealing mistake: When the crocodiles approach the tree, one of them is layered under a rock. (00:11:57)
Star Koopa - S1-E51
Revealing mistake: When Princess Toadstool zaps the Stormtroopa holding Luigi, the light around it is misplaced. (00:06:48)
Star Koopa - S1-E51
Revealing mistake: When Princess Toadstool explains that the Mushroom Colonists have a right to be on their planet, a line on her dress appears over her right arm. (00:07:13)