Chocolate With Nuts / Mermaid Man And Barnacle Boy V - S3-E11
Continuity mistake: When Barnacle Boy and E.V.I.L. are hiding behind the rock you can see Barnacle Boy's fingers. In the next shot he is wearing gloves.
Chocolate With Nuts / Mermaid Man And Barnacle Boy V - S3-E11
Continuity mistake: Chocolate With Nuts: While SpongeBob and Patrick are selling chocolate, the elderly female's door opens at the left, but after Patrick claims their chocolate will make you live forever, the door is open the opposite way.
Chocolate With Nuts / Mermaid Man And Barnacle Boy V - S3-E11
Continuity mistake: Mermaid Man And Barnacle Boy V: When Barnacle Boy shouts that he wants to be called Barnacle Man and demands respect, the door to Krabs' office is missing. Then it happens again when the news comes on.
Chocolate With Nuts / Mermaid Man And Barnacle Boy V - S3-E11
Continuity mistake: In 'Chocolate With Nuts' the bandaged up fish's house's front stairs had only a few steps when Spongebob and Patrick approached, but as the fish falls down there's suddenly a lot more.
Chocolate With Nuts / Mermaid Man And Barnacle Boy V - S3-E11
Continuity mistake: In "Chocolate With Nuts", Patrick and Spongebob buy the chocolate holding bags from one man, they walk to the next house next door. When they are standing next to the door, the first house behind them disappears.
Chocolate With Nuts / Mermaid Man And Barnacle Boy V - S3-E11
Continuity mistake: After MermaidMan screams "To Make Out Reef" he accidentally falls over on his chair. When Patrick complains that they aren't gonna get pizza the chair is back up again.
Club SpongeBob / My Pretty Seahorse - S3-E12
Revealing mistake: In Club SpongeBob, when SpongeBob, Patrick and Squidward are in the forest, Squidward asks the magic conch shell if he can have something to eat. Straight after he asks "Can't you say anything else but 'No'?", it has a close-up of the shell. But Squidward's arm appears to be yellow, like SpongeBob's. This error was later corrected in 2019 when the episode was remastered for digital releases.
Club SpongeBob / My Pretty Seahorse - S3-E12
Continuity mistake: My Pretty Seahorse: After Krabs tells SpongeBob the restaurant is not a place for a live horse, when SpongeBob walks out with the seahorse the swinging door to the Krusty Krab's kitchen opens in the opposite direction than previous shots.
Club SpongeBob / My Pretty Seahorse - S3-E12
Continuity mistake: In "My Pretty Seahorse", Spongebob is walking outside with Mystery and a customer with a drink and a plate is watching him go by. In the next shot, Squidward places a bowl of onions underneath his face, and his plate and drink have disappeared.
Club SpongeBob / My Pretty Seahorse - S3-E12
Continuity mistake: In "My Pretty Seahorse", Squidward finds a bowl of onions right under his nose on the counter. In a few shots, from behind Mr. Krabs, the onions have disappeared.
Club SpongeBob / My Pretty Seahorse - S3-E12
Continuity mistake: In "My Pretty Seahorse", Spongebob is using a spatula with slots in it. Later, when Mystery eats it, the spatula is now completely flat.
Club SpongeBob / My Pretty Seahorse - S3-E12
Continuity mistake: In "My Pretty Seahorse", Spongebob places a tray of Krabby Patties on the counter, which Mystery promptly eats, leaving an empty tray. In a few shots, the tray has disappeared from the counter.
Club SpongeBob / My Pretty Seahorse - S3-E12
Continuity mistake: In "My Pretty Seahorse", Spongebob is watching Mystery from behind a rock, as she eats flowers. She eats a flower right next to an uneaten one. Later, she eats the previously uneaten flower. In the next shot, the flower has now regenerated and Mystery eats it again.
The Graveyard Shift / Krusty Love - S3-E13
Continuity mistake: In "The Graveyard shift", Squidward begins to count the signals that means the ghost will appear. "First the lights, then the phone.", and a green slime appears in the wall. Squidward says "Oh, wait, they always do that, but what was the third thing?", and the bus appears at the front of the Krusty Krab. SpongeBob says, "I didn't know the bus comes here at this hour", and look at the wall: the green slime has disappeared.
The Graveyard Shift / Krusty Love - S3-E13
Continuity mistake: When Squidward sees the "ghost", he gets so frightened that hair comes out of his head and his job's hat falls off. In the very next shot, the hair is gone, and the hat is there again.
The Graveyard Shift / Krusty Love - S3-E13
Continuity mistake: In "Graveyard Shift," when Squidward says to that guy they think is the hash-slinging slasher, "If that was you on the phone and you on the bus, then who was flickering the lights?" look at the "order here" sign. It says "order hear" instead of "order here," which it reads in previous shots during this episode.
The Graveyard Shift / Krusty Love - S3-E13
Continuity mistake: When SpongeBob is cleaning the roof, you can see that there isn't nothing up there. The very next shot shows a closer view to SpongeBob and we can see that is a bucket there. That wasn't there before.
The Graveyard Shift / Krusty Love - S3-E13
Continuity mistake: In 'The Graveyard Shift' Squidward explains that there are three signs concerning the arrival of the Hash-Slinging Slasher. He then holds up three hands. In the next shot, he is only holding up one hand.
The Graveyard Shift / Krusty Love - S3-E13
Continuity mistake: Graveyard Shift - Sometimes the kitchen walls are light green, and sometimes they are dark green.
New Student Starfish / Clams - S3-E14
Continuity mistake: New Student Starfish: Spongebob shows Patrick the Good Noodles board when they enter the classroom. Then when Patrick is trying to tell the class his name, the number of stars on it change, and the name "Rich" appears on it, which wasn't there before. Later on, when Spongebob and Patrick are in detention, the names on the board are completely different in some shots. (00:02:48 - 00:11:24)