Goofs

King Neptune puts a lock on the door to make sure Mindy does not get back in but when the bucket heads break through there is no lock on the door.

When Mr. Krabs and King Neptune hear Plankton's fake message, at the end we hear the click of the phone hanging up; yet when King Neptune bellows with rage a few minutes later Plankton is still on the phone as he is able to hear it.

Towards the end of the movie, the bucket head people walk through the windows of the Krusty Krab, breaking them. In the very next shot you can see windows fixed.

When Goofy Goober is singing the theme song, he starts the song with his lollipop in his hand, but when the finger pointing to the kids pops out of his chest, the lollipop disappears and in the next scene the lollipop is in his hands again as he sweeps it around.

Before the chase scene between Spongebob, Patrick, and the monster who has a tongue dressed as an old lady, the tongue's old lady costume falls off. Then, during the chase, it is back on again.

In the opening sequence, Mr. Krabs says to Spongebob that the customer "took a bite of the burger, and... No cheese!", but when Spongebob goes in to help the customer, there isn't a bite taken from the burger. The opening sequence is a dream and things in dreams aren't always as described.

Spongebob points out that he has been awarded Employee of the Month award 374 times in a row. That would mean that he would have worked at the Krusty Krab for 31 years. This could not happen - according to Stephen Hillenburg, Spongebob was born in 1984, which would mean that, as of 2004, he would only be 20. However, Hillenburg also confirmed that the events in the movie take place after the entire TV series, therefore SpongeBob has 374 consecutive awards, as well as there are now two Krusty Krab's, rather than one.

It previously said here, "It takes SpongeBob and Patrick six days to get to Shell City but Plankton makes it there and back in just a few hours." Plankton doesn't take the crown to Shell City personally, he actually takes it to the Chum Bucket, where he then has it shipped off to Shell City.

In SpongeBob's dream, the police are blocking the entrance. Yet, when SpongeBob says, "I'm going in," there are no police in his way. However, because it's a dream, the police would have vanished without explanation anyway.

The two gas station attendants tell SpongeBob and Patrick that they will not last 10 seconds over the county line. After crossing the line their car is stolen in 5 seconds, yet when asked how many seconds they lasted, one of the attendants answers "12." This is exactly how long they had been over the line when he checked his watch, not how long it took for their car to be stolen.

When Patrick and SpongeBob are trapped in the fishbowl in Shell City, there is one shot where the gravel in the bottom is reflected on the side, but Patrick and SpongeBob are not in the reflection.

At the end of the movie, SpongeBob told Squidward that his fly was down, which didn't make sense because he didn't wear pants.

It's unknown if Dennis survived or not.

If Sandy was wearing her air helmet, she shouldn't have been able to wear Plankton's mind-controlling helmet.

At the end of the movie, Mr. Krabs says, "I'm going to do something that I should have done six days ago." He means seven, because it was the day after when SpongeBob got the six day challenge to get the crown.

SpongeBob leaves Bikini Bottom for Shell City without making arrangements for his pet snail Gary.