This is Spongebob...

This movie is basically a hybrid of three Spongebob episodes:

1) The episode where Squidward and Spongebob are forced to work a night shift at the Krusty Krab.
2) The episode where Mr. Krabs and Spongebob think they accidentally killed a health inspector.
3) The episode where Patrick has a secret box and refuses to let Spongebob look inside it.

(repost from YouTube comment)