
A square yellow sponge named SpongeBob SquarePants lives in a pineapple with his pet snail, Gary, in the city of Bikini Bottom on the floor of the Pacific Ocean. He works as a fry cook at the Krusty Krab. During his time off, SpongeBob has a knack for attracting trouble with his starfish best friend, Patrick. Arrogant octopus Squidward Tentacles, SpongeBob's neighbor, dislikes SpongeBob because of his childlike behavior.
Sandy seeks Squidward's help to heal her sick tree, but his alternative gardening methods give her a headache; SpongeBob and Squidward search for the perfect birthday present for Mr. Krabs.
The friends become unstoppable after Sandy teaches them karate; before long, the entire town learns the martial art and joins the action.
Once Fred's leg heals up, SpongeBob is determined to keep it out of harm's way; Patrick's lemonade stand is unsuccessful until he gets a secret ingredient from Squidward.
Mr. Krabs decides to start selling hot dogs; SpongeBob and Patrick discover a lost ship.