Continuity: Spongebob turns the "M" on Mermaid Man's belt upside down to "W" to set it to "Wombo" to re-size Squidward. A few moments later in the same scene, it is an "M" again, without him ever touching it.

Continuity: In the scene where the guard pulls Mrs. Puff out of the rock yard, her hat is red, then blue, then red again throughout the cuts in the scene.

Continuity: When mermaid man and barnacle boy are looking for the invisible boatmobile, there are boats all over, even in front of the windows, but when Spongebob is inside running towards the door there are now no boats visible out the window.