Audio problem: When they are trying to escape Koopa and the little caveman speaks, then Luigi answers him, he has the Princess' voice.
Continuity mistake: In season 1 Hobbie was 13 and in season 2 he is 10 years old.
The Leap Home (1) - November 25, 1969 - S3-E1
Factual error: The Post Raisin Bran cereal box sitting on the Beckett family breakfast table in 1969 has a 1990s box design. (00:18:00)
Onna no koi wa snesouyo! Kakutou shintaisou de iza shoubu - S1-E12
Audio problem: When Ranma and Akane close the door behind them avoiding the gas trap, the English dub adds a lot of coughing, even when they have their mouth closed. (00:16:40)