Dunces and Dragons: After a freak jousting accident at a Medieval Times-style restaurant, SpongeBob and Patrick are transported to a medieval version of Bikini Bottom. There they are mistaken for great knights and sent on a quest by King Krabs to rescue his daughter, the Princess Pearl, from the clutches of the evil wizard Planktonamor. To keep them company, the King sends along Squidward, the court jester (who was recently thrown in the dungeon for not being funny). The first obstacle they encounter is the dreaded Black Knight, an ornery squirrel who fights under the spell of Planktonamor. But Sir SpongeBob bests the Black Knight in a brilliant display of Ka-ra-te, and even breaks Planktonamor's hold on her. The Black Knight pledges herself to the heroes' cause, and the group of four marches on to Lord Plankton's lair where they encounter the giant fire-breathing jelly fish. Fortunately Sir SpongeBob has just the thing that will tame the dangerous beast, a krabby patty that he was saving in his pocket for lunch. The knights finally get through Plankton's defenses, save Princess Pearl, and restore peace to the kingdom.
—NAS