Other mistake: In the show's introduction, the giant clock comes and smashes a baseball cap on Rocko, growing him up. Then, when the giant blue hand picks him up, the baseball cap disappears mid-shot, with no explanation. (00:00:15)
Rocko's Modern Life (1993)
1 other mistake in show generally
Starring: Tom Kenny, Carlos Alazraqui, Charles Adler, Charlie Adler, Mr. Lawrence
Fish-N-Chumps / Camera Shy - S3-E4
Continuity mistake: Near the end of "Camera Shy," when Heffer gets the check out of the envelope, it's light blue. But when the shot changes it suddenly becomes black like the "censor bars" sticking on him and Filburt, so they obviously accidentaly used the wrong color.
Filburt: You turn the page, wash your hands. Turn the page, wash your hands. Turn the page, wash your hands.
The Big Question / The Big Answer - S3-E11
Trivia: At one point in this episode, Hefer says "please put me down Mr. Crabs." Most of the crew from this show went on to make SpongeBob SquarePants a few years after Rocko ended, which has a character named Mr. Crabs.