Continuity mistake: When Mario, Toad and Luigi are driving to the rebel fort, the seatbelts they are wearing disappear for most of the scene. (00:17:30 - 00:18:40)
Two Plumbers and a Baby - S1-E17
Continuity mistake: In one scene, Luigi is wearing the same color hat as Mario and when Luigi opens his mouth to talk, it's Mario's voice we hear.
Continuity mistake: When Toad screams and runs away after the Bob-omb lights, Mario, Luigi and their car disappear. (00:16:00)
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)
Love 'Em and Leave 'Em - S1-E8
Continuity mistake: In the scene where the Princess first has the idea for getting another love potion, the spots on Toad's head change to black then back to red. (00:14:12)
Continuity mistake: When the Mario Bros. speed up their car to get to the rebel fort, in one shot both of Mario's hands are on the steering wheel, and in the next shot his right hand is on some sort of lever that makes the car go faster. Luigi's hands also change position in these shots. (00:17:45)
Raiders of the Lost Mushroom - S1-E49
Continuity mistake: Near the end, when Koopa escapes through the warp you will see, for a split second, that Mario and Luigi have switched their colors. (00:38:15)
Continuity mistake: When Mario, Luigi and Toad say goodbye to the Princess, Toad is standing at the front of their car, Luigi in the middle, and Mario at the back. Two shots later, the order changes to Mario at the front, then Toad, and Luigi at the back of the car. (00:15:10)
Continuity mistake: The Thunderbirdo is supposed to be pink. It is green when first visible after Koopa orders it up. It turns green again right before it explodes. (00:19:15 - 00:23:55)
Continuity mistake: At the beginning of the episode, when Koopa's state Troopa makes the Mario gang pull over, both vehicles stop in the middle of the road. From there on, the cars are at the side of the road. (00:13:55 - 00:16:25)
Continuity mistake: After the Marios say goodbye to the Princess, Mario is at the front of their car, then Toad, and Luigi at the back. Mario and Luigi swap places for the rest of the scene. (00:15:15 - 00:16:10)
Continuity mistake: When Koopa sends Mouser to hunt down the Marios after finding out they've escaped, the binoculars that he was holding have disappeared. (00:17:55)
Continuity mistake: As Mario, Luigi and Toad speed to the rebel fort, the side-view mirrors keep disappearing. (00:17:25 - 00:18:40)
Raiders of the Lost Mushroom - S1-E49
Continuity mistake: When Koopa escapes through the warp at the end, the hole closes up. When Mario says "We sure whipped him this time," (meaning Koopa) look at the ground and you will see that everyone is standing next to the wide open hole. (00:38:25)
Robo Koopa - S1-E52
Continuity mistake: Koopa manages to take Toad and the Princess hostage by surrounding them in electric force fields so they can't move. These force fields disappear when Koopa starts chasing Mario, Luigi, Bunsun and Dr. Nerdnik. (00:05:50)
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: In the first chase scene of Koopa running after the Mario gang, at one point, Koopa fires two bullet bills at the plumbers. In the next two shots, there are three bullet bills seen, and when the gang ducks, two bullet bills fly past them. (00:02:00)
Love 'Em and Leave 'Em - S1-E8
Continuity mistake: After Luigi says "Let's play cupid," he peeks around the corner along with Peach and Toad down at Mario going down the aisle with his "bride-to-be." Luigi, as expected, has been wearing green all episode, but when you see them peeking around the corner, Luigi's hat has become red. In the very next shot showing Luigi from behind, his hat has returned to green. (00:14:40)
