Things are going great at the Krusty Krab, until suddenly an alarm begins to blare, signaling an attempt by Plankton to steal a Krabby Patty. Plankton, controlling the patty, escapes outside with it by making a hole in the wall with a laser. SpongeBob heroically chases after it. After a long chase, SpongeBob finally recovers the Krabby Patty, and is congratulated by the townsfolk, while Plankton walks away sadly. SpongeBob, feeling sorry for Plankton, decides to befriend him.
SpongeBob invites Plankton to jellyfish with him, and, realizing he can take advantage of SpongeBob, Plankton goes. At Jellyfish Fields, Plankton remains fixated on evil and destruction, and SpongeBob tries to explain fun by singing The F.U.N. song.
Eventually, Plankton starts singing the song as well, and seems to finally be having fun. He seems to forget about stealing the formula, and begins to develop a genuine sense of friendship. When Mr. Krabs sees this, he refuses to believe that Plankton has changed and sets up a trap for them when they come to the Krusty Krab together the next day.
He attempts to tempt Plankton with a Krabby Patty, but he seems not to take the bait.
After SpongeBob and Plankton leave to go to the movies, Mr. Krabs begins to suspect that Plankton really has gone straight and nice, until he realizes that he actually did take the patty. At the Reef Cinema, Mr. Krabs appears in front of the projector and shouts "reach into his pocket now and take what he's got!".
SpongeBob reaches into Plankton's pocket and finds a Krabby Patty (the other people simply steal from their neighbor's pocket and leave the theater). SpongeBob realizes that Plankton used him to get a Krabby Patty, and Plankton attempts to explain that he realizes now that he only ever wanted friendship, before admitting to everything and running off with the patty. However, he runs directly through the movie screen into a solid wall.
Plankton is squashed, badly, and Mr. Krabs flicks him off the wall onto Bubble Bass' hand, who mistakes Plankton for a jellybean and chases him around his hand.
Shower In A Can!
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When Squidward says, "How does it feel to be the most hated thing in Bikini Bottom, Plankton?", he ends it with, "It hurts, doesn't it? I know!", possibly suggesting that Squidward knows he too is disliked by the people of Bikini Bottom.
The F.U.N. song is sung during the SpongeBob Krabby Patty Celebration at Nickelodeon Suites in Orlando.
If you listen carefully, the boot squeak sound effect from "Squeaky Boots" can be heard when the policeman puts the "Honorary Rookie" donut on SpongeBob.
This is the first time Plankton was mistaken as candy (in this case, a jellybean). It happened again in "20,000 Patties Under the Sea," where Plankton was mistaken for chocolate.
This is one of the few times Plankton is friends with any of the main/recurring characters.
The adventure music heard when SpongeBob chases after the patty is a parody of the Indiana Jones theme music.
The Krabby Patty appears bigger than usual in this episode.
When Plankton is talking to Karen, and he asks "What are you talking about?", the captions say "What do you mean?"
Captions misspell "Bubble Bass" as "Bubble Bath." This also happened in "Pickles."
The captions also misspell "SpongeBob" as "Sponge Bath," as seen when Karen tells Plankton to befriend SpongeBob so he can steal the Krabby Patty.
When Karen says: "What did you do with the Krabby Patty?", captions say: "Where's the Krabby Patty?" When she says to Plankton: "You're forgetting the mission," captions say: "Remember the mission?"
When SpongeBob falls back down from the sky, the Bikini Bottomites are holding the word "rookie" while singing "For He's a Jolly Good Rookie." However, captions say (cheering).
Plankton is slightly taller than normal.
When SpongeBob is thrown in the air, the sky is green. But when he lands, the sky is blue.
When the movie theater is first shown, there are eighteen people sitting inside, but in later scenes, there are less.
When SpongeBob is looking for the patty with binoculars, the fishfolk are walking slowly in lines. But when he spots the patty, they begin walking faster.
When Plankton is leaning against the door of the Chum Bucket, he appears to be as big as the door.
When SpongeBob chases the patty off a building, he uses his blown-up hat to bounce about town. But when he catches the patty at the magic shop, his hat was back on his head and deflated.
When SpongeBob and Plankton are at Jellyfish Fields, SpongeBob gave Plankton a jellyfish net, but in the next scene, Plankton is not seen with the net and it's not seen on the floor.