Once Upon a Time is an episode in the Super Mario 64 Blooper series. It takes place in the fantasy kingdom of Midnight.
PS889 says hello to the audience, and asks them if they want him to read them a fairytale. The audience says yes, and so PS889 begins his story.
Once upon a time, in a beautiful kingdom, there lived a knight named Sir Spaghetti. Orphaned at an early age thanks to an evil wizard, the knight started working for the King. The King's daughter, a beautiful young princess, was the knight's only friend.