7 Continents for 7 Koopas - S1-E22
Character mistake: When King Koopa notices the Koopalings running to him, the screen with Antarctica has its title misspelt as "Antartica." Also, the dragon that appears on the screen for Asia goes from green-yellow to white and blue.
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.