Jimmy makes a little jell-o like blob named Jiggles. He notices that Jiggles doesn't like fish, but he does likes fruit and grows when he eats the fruit. Meanwhile, Sheen was making a fruit bled, but uses too much fruit and throws them too quickly.
Jiggles eats some fruit Sheen dropped out of his house. Jimmy finds Jiggles and takes him back to his lab, but Jiggles gets heavy. SpongeBob, Jimmy, Timmy and B.O.B. noticed that Jiggles has grown huge (all but Jimmy now thought of Jiggles as a monster)! He's then got mad at them because he truly cares about Jiggles.
Jimmy then talks to Jiggles, but he quickly leaves. Jiggles then took bananas from Bing and then told that to SpongeBob, Timmy and B.O.B.. Jiggles seemed to be growing bigger and Jimmy tries pushing it back in the lab.
Timmy wishes for screwed nuts to lock the door, but Jiggles makes a hole in the roof so it could get outside. Jimmy makes a plan: Timmy gets a coconut-pineapple sunscreen that they will spray on the X. When Jiggles comes, they will trap him.
Sheen grabs the sunscreen and spraying it on himself (not knowing about Jiggles or the plan.) Jiggles then eats him, but doesn't digest, he just keep him inside. Jimmy said that Sheen was a "Jiggles-hater" and deceives it. He then believes that SpongeBob, Timmy and B.O.B. were haters too, so he leaves.
Jiggles then ate Jimmy because his arms had a fruit-scented smell from feeding Jiggles fruit. He then tries to get the fish that he had for lunch out, but he's not Timmy. So Sheen had to stick his hand inside Jimmy.
He finds the Krabby Patty and Jiggles spits them out, but he thinks that they're fruit. He soon realizes that he needs SpongeBob, Timmy and B.O.B. and they came. He gets some gear and used it on Jiggles. SpongeBob, Jimmy, Timmy and B.O.B. thought Jiggles was gone, but it seems that he used the shrink ray and tried to start over.
- Jimmy Neutron
- SpongeBob SquarePants
- Timmy Turner
- B.O.B. (Benzoate Ostylezene Bicarbonate)
- Sheen Estevez
- Chester McBadbat
- Patrick Star
- SpongeBob, Jimmy, Timmy and B.O.B.'s Headquarters
- Jimmy's Laboratory
- Sheen's house
- Zoo Snack Bar