It was one of their best series and I am glad Nickelodeon is starting to pay more attention to it again as it is starting to pop up in Nick games and theme parks. All-Stars Brawl and soon Nickelodeon Kart racers 3 will have representation from Jimbo.
The show itself was also great. It is always depicted as Nick's answer to Dexter, but it was fairly different. It was one of the first Nick shows along with Fairly Odd Parents to have continuity, reoccurring villains, etc.. It is crazy to go back and see just how big the show was though. Like Rugrats, I think we forget the scale of how big the Nickelodeon show was. Jimmy was a huge part of the Nick brand, astro-turfed, maybe, but still large. The fact that he got a full on ride in Universal, and was definitely the leader for the Nick games was big. Jimmy also had a lot of product tie-in ads, particularly Crysler cars, his final appearance.