Continuity mistake: When the Mario Bros. are revealed, Mario is wearing the tank top of his disguise, but in the next shot, he is wearing his normal clothes. (00:15:18)
Continuity mistake: Normally, Blackbeard Koopa's ship is blue, but when Princess Toadstool is on his ship, it turns brown like Captain Clump's. This also happens when it is docked at his fortress. (00:08:29 - 00:11:17)
Revealing mistake: When King Koopa tells Dr. Sheldon to make a potion that will stop Princess Toadstool, he is briefly layered between a podium and a bag. (00:12:28)
Continuity mistake: When Butterfingers urges Princess Toadstool to stay, her leg bracelet disappears. This also happens when they run away from King Koopa. (00:12:14 - 00:14:34)
Continuity mistake: Throughout its appearance, the grey sideskirts on Mario and his friends' car turn brown like the rest of the car several times. (00:03:44 - 00:09:06)
Revealing mistake: When Mario and his friends start running to the drainpipe, Drainotto runs in place for a few frames. In the same shot, Toad briefly runs in midair, and shortly after, he is layered underneath a rock. (00:13:18)
Continuity mistake: Throughout the episode, the white spikes on King Koopa's tail are coloured orange instead.
Revealing mistake: When Mario shoots fireballs at Koopa Khan and his army, a fire is layered over a Snifit. (00:12:48)
Continuity mistake: When Mario and his friends look at Koopa Khan while on the bridge, Princess Toadstool does not have a cape. But when she and her friends fall after Koopa Khan destroys the bridge, one appears. (00:10:49)
Continuity mistake: When Drainotto says that he could make an underground river with some help, the number of fingers he has on each hand changes from five to four. (00:07:46)
Audio problem: When Mario and Luigi are excited to return to Brooklyn, Mario's mouth moves, but no sound can be heard. (00:07:26)
Continuity mistake: When Toad puts his cap back on, his torso changes from skin-colour to blue, while his trousers change from blue to skin-colour for a few frames. (00:04:59)
Continuity mistake: When Moon Man Koopa first appears, he has no wristbands, but when he activates a magnet, some appear. (00:08:10)
Audio problem: After the missile flies over Mario and his friends, Toad's mouth moves before any dialogue comes out. (00:07:03)
Revealing mistake: When Mario tells Toad to grab him, Toad is not fully drawn. (00:04:27)
Continuity mistake: After Princess Toadstool says that King Koopa tricked the Mario Bros, King Koopa's yellow eyes turn white. This also happens after Toad says that the Mario Bros. are safe. (00:09:39 - 00:10:18)
Continuity mistake: When King Koopa first appears, he has two Koopa Troopas with yellow underbellies. But when Princess Toadstool says that he tricked the Mario Bros, one of the Koopa Troopa's underbellies turns purple. (00:09:34)
Revealing mistake: When Princess Toadstool spots King Koopa, King Koopa and his minions are layered over a wall. (00:07:14)
Continuity mistake: When the Mario Bros. pass King Koopa's minions after surviving the first trap, the lenses on Mouser's glasses disappear. (00:11:49)
Love 'Em and Leave 'Em - S1-E8
Revealing mistake: After Luigi pours the love potion, Mario's arms are missing for a few frames. (00:15:45)
