Jimmy, Sherman, and their friends are back as 10 year old Trent heads off to Camp Wauwanakua, leaving his toys to their own devices. Things shift into high gear when an obsessive toy collector name Evan Worthington, the son of the owner of Worthington's Toy Stadium, kidnaps Sherman. At the Worthingtons' apartment, Sherman discovers that he is a highly valued collectible from a 1990's TV show called "Nicktoons Roundup." He meets the other prized toys from the show: Penny Peterson, Cindy Vortex, Libby Fulfax, Sheen Eztavez, Carl Wheezer, the PS118 students, Gompers the goat, and Goten the Prospector. Trent's toys mount a daring rescue mission, Jimmy Neutron meets his match, and when he is tempted by the idea of lasting forever in a museum, Sherman has to decide where he and his heart truly belong.
Timmy's entry into sixth grade is disrupted by the arrival of a famous scout. He will then try to get rid of him once and for all.
This story happens a little before the episode "How to eat with your butt", episode in which Jimmy appears again after "Cripple Fight". It also happens in the 2000s (the characters are then between 10 and 11 years old.) There's also differences (big and small) with the actual canon of the series.
(this is not exactly a TimJim story; however, i'm gonna write some when i finish this one because i love their dynamic)