Achintha Madumal

Avatar: The Last Airbender -- one of the greatest Nicktoons of all time, only more different; it was more action-packed and much continuity. In fact, it's a stunning masterpiece, even for 2005. It has amazing bending sequences, action scenes, funny and heartwarming moments, comedic reliefs such as Sokka, brilliant voice acting, and vibrant anime-inspired character designs and animation, courtesy of such studios including DR Movie, JM Animation and Moi Animation...something Nick didn't have before. It lasted 61 episodes over three seasons -- or in this case, "books"; the last book, Air, would be used for The Legend of Korra's first season. It helped change the face of Nickelodeon... and then came 2008, when it ended with a bang. The network then focused more on funny sitcoms, wacky Nicktoons, and acquired programming including those from DreamWorks Animation (which would be effective by 2013, when Paramount gives up its distribution of their films to 20th Century Fox, which in turn was succeeded by Universal in 2016--but that's not the point).