Continuity mistake: When Madzilla picks up the Koopalings, the yellow rim on Big Mouth's shell turns white. This also happens when he gets them a car. (00:03:28 - 00:03:57)
Polly Wants a Treasure - S1-E8
Continuity mistake: In the scene where Baloo and Kit walk through the Sea Duck's cargo area to try and find who they think is a stowaway, Baloo lifts a crate of fragile crystal glasses over his head. The crate rotates between shots, judging by its red "Fragile" stamp.