Penny Foolish/Nautical Novice - S6-E2
Continuity mistake: In "Penny Foolish" when Mr. Krabs is driving at night, there are a bunch of buildings surrounding him. Then when the shot cuts to the steering wheel and back to Mr. Krabs the buildings disappear.
Selling Out/Funny Pants - S4-E5
Continuity mistake: In "Funny Pants" when Mr. Krabs tells SpongeBob to touch the money the anchor on the door is yellow. In the next shot, it is red, like it is in other episodes.
Tunnel of Glove/Love That Squid - S8-E14
Continuity mistake: In "Tunnel Of Glove" the amount of police tape on the entrance of the tunnel of glove changes. Some shots there are three pieces of tape, others there are four.
The Snowball Effect / One Krabs Trash - S3-E3
Continuity mistake: In "Snowball Effect" when Squidward rips apart the "peace treaty" it is nothing but shreds on the ground. About ten shots later, the shreds disappear.
The Snowball Effect / One Krabs Trash - S3-E3
Continuity mistake: Throughout the episode "The Snowball Effect" Patrick's house is missing.
Suggested correction: I just watched this episode and on at least two occasions I could see Patrick's home in the background.
The Graveyard Shift / Krusty Love - S3-E13
Continuity mistake: Graveyard Shift - Sometimes the kitchen walls are light green, and sometimes they are dark green.
Tenacle-vision/I Heart Dancing - S7-E8
Continuity mistake: In Tentacle-Vision Squidward ties Patrick up to the camera. However, when Mr. Krabs, Pearl, Plankton, and Sandy interrupt Squidward Chat, the camera is visible. Patrick is nowhere to be seen.
The Original Fry Cook / Night Light - S5-E9
Continuity mistake: Near the end of "Night Light" Patrick gets burned by the sun, and the wooden stem atop his house is missing.
Selling Out/Funny Pants - S4-E5
Continuity mistake: In "Selling Out" when the Krabby O'Mondays is just about to flood, SpongeBob and Squidward have their Krusty Krab hats on. About ten seconds ago, they had their Krabby O' Mondays' hats on.
Nasty Patty / The Idiot Box - S3-E4
Continuity mistake: When SpongeBob is showing Squidward the inside of the box, SpongeBob is seen closing the top of the box. But inside of the box, there is a close-up of SpongeBob and Patrick. You can see daylight so the box is obviously open.
Continuity mistake: When SpongeBob sees the kandy machine, the front of the machine is facing the road, but when he runs over to it, the front is now turned away from the road.
Hello, Bikini Bottom/Extreme Spots - S8-E29
Continuity mistake: In "Hello, Bikini Bottom", when we see Mr. Krabs' list of what he needs for the tour, the word "roadie" is on the bottom of the list, but when we see the list again later on, "roadie" is in the middle of the list.
Gullible Pants/Overbooked - S6-E19
Other mistake: In Overbooked, when Patrick tells Sponge-Bob about his birthday, Sponge-bob put a Krabby patty in his pants. In the next scene when you see Sponge-Bob, the patty is gone.
Continuity mistake: In "New Leaf", When Mr. Krabs throws Plankton's snow globe in to the room, there is no lock. In the next shot, there is.
Summer Job - S7-E18
Continuity mistake: Mrs. Puff hands Spongebob the order for a Krabby Patty. In the next shot, he is not holding the order, nor is it on the floor.
Rise and Shine / Waiting / Sing a Song of Patrick - S5-E1
Continuity mistake: In "Waiting", SpongeBob has milk on his face. It then cuts, and the milk is not on his face anymore.
Squidtastic Voyage/That's No Lady - S4-E15
Continuity mistake: In "That's No Lady", Squidward is standing at the register, holding a newspaper. When it cuts to "Patricia", and back to Squidward, Squidward isn't holding the newspaper anymore.
Skill Crane/Good Neighbors - S4-E4
Continuity mistake: In "Good Neighbors", Squidward stomps on Spongebob and Patrick's fezzes in front of his door. Then, it cuts to a shot of Squidward's house, but the fezzes are gone.
Help Wanted / Reef Blowers / Tea at the Treedome - S1-E2
Continuity mistake: The office door in the Krusty Krab is missing throughout the episode.
Suggested correction: It's a pilot episode. Things can change with a show when it gets picked up into a series.
House Sittin' for Sandy/Smoothe Jazz at Bikini Bottom - S8-E23
Continuity mistake: When Sandy finds SpongeBob and Patrick after wrecking the tree dome, the distance between SpongeBob/Patrick and Sandy changes constantly between shots.