Opposite Day

Squidward is still asleep, only to be woken up and then annoyed by SpongeBob and Patrick, who came into his house to throw a surprise birthday party for him. When they leave, he shouts that it isn't his birthday and decides to move out of Bikini Bottom the next day. That afternoon, he calls Patty Rechid from Bikini Realty to arrange for his house to be sold, so that he may move out of the neighborhood. He is warned that if his home is surrounded by bad neighbors, the house may not be sold. Squidward is convinced that SpongeBob and Patrick may ruin his chances of selling his house. Squidward thinks that whatever a good neighbor does, SpongeBob and Patrick do the opposite, which gives him an idea.

A now-goofy Squidward tells SpongeBob that it is Opposite Day the next morning, and that everyone must act opposite to how they usually act. A now-grumpy SpongeBob believes him, and informs Patrick, who stops breathing, until SpongeBob exclaims, "not that opposite!" A montage of the two doing "opposite" things, such as talking backwards and acting as Gary's pets, is then shown. Squidward's plot soon begins to backfire on him. SpongeBob "fixes" (damages) his house, and a shocked Squidward cleans the debris with a bulldozer. SpongeBob concludes that Squidward is acting like him, and he must therefore act like Squidward.

While Squidward is still fixing SpongeBob's house, Patty arrives, and SpongeBob and Patrick both pretend to be like Squidward, giving her a tour of the house, while describing it negatively and doing the opposite of what she asks. When Squidward realizes what is going on, he rushes to his house and attempts to explain the situation to Patty, who, upon hearing that he is "Squidward" as well, finally sees through everything and berates them of intentionally messing with her.

Gary comes in with a pickle on his face, resembling Squidward's large nose. He meows with a Squidward-style voice, and she angrily storms out. Squidward begs Patty to sell his house, but she refuses stating she wouldn't sell the house if he was the "last Squidward to exist on Earth" and then she storms off.

SpongeBob and Patrick tells Squidward "Happy Opposite Day." A furious Squidward shows SpongeBob and Patrick how much he "hates" (likes) them by attempting to run them over with the bulldozer, scaring SpongeBob and Patrick out of their wits as he is now on the warpath against them. SpongeBob then asks Patrick if he ever feels that Squidward likes them too much.