Robo Koopa - S1-E52
Continuity mistake: When Mario, Luigi, Bunsun and Dr. Nerdnik are about to be crushed by the electric pole, when Luigi moans "we're doomed," he is in front of Mario. In the next shot, Mario is looking ahead while saying "doomed, schmoomed." In this same shot, Mario pulls Luigi over to a nearby fire hydrant, and Luigi moves onscreen from Mario's right. Therefore, Luigi has changed position. (00:07:10)
Robo Koopa - S1-E52
Continuity mistake: At the beginning of the shot, where Dr. Nerdnik builds the Plumbinator, the Mario Bros. change positions, even though they were standing the whole time. (00:08:00)
Robo Koopa - S1-E52
Continuity mistake: The Plumbinator is light blue. It changes to a darker blue when Mario says "May the best machine win" to Koopa. (00:10:05)
Robo Koopa - S1-E52
Continuity mistake: As the fight between Koopa and the Plumbinator begins, in one shot the camera zooms in to Koopa while under the Plumbinator's legs. Robo Koopa's color is light blue in this shot, when it is dark blue in the rest of the episode. (00:10:15)
Robo Koopa - S1-E52
Continuity mistake: At the start of the fight between Robo Koopa and the Plumbinator, Koopa fires a black bomb. The number of bombs in this sequence keeps changing, from 1 when he fires it, then 3, then 2 when the Plumbinator sends the bombs back to Koopa, then 3 again, and finally 2 when Koopa dodges the returned bombs. Also, the color of the bombs keep changing from black to red. (00:10:20)
Robo Koopa - S1-E52
Continuity mistake: During the fight, the egg stains on Koopa either disappear or move around him. The stains eventually disappear entirely. (00:10:40)
Robo Koopa - S1-E52
Continuity mistake: During the fight, when the Plumbinator starts firing eggs at Koopa, for a brief time the buttons on the left side of Koopa have vanished. (00:10:40)
Robo Koopa - S1-E52
Continuity mistake: During the fight sequence, Koopa ties a rope around the Plumbinator's metal body and pulls the Plumbinator over to him. Luigi cuts the rope with a pair of scissors, causing Koopa to fall back. The part of the rope tied on the Plumbinator disappears for the rest of the scene. (00:10:50)
Robo Koopa - S1-E52
Continuity mistake: When Luigi crawls out of the remains of the Plumbernator warsuit, his face is still in the unit of where it was when he was in it, even though he's outside of it right now. (00:11:40)
Robo Koopa - S1-E52
Continuity mistake: Near the end of the episode, when Koopa is tricked into pushing the ejector seat button, Bunsun has disappeared beside Dr. Nerdnik. (00:12:30)