Avatar: The Last Airbender

Avatar: The Last Airbender has garnered a massive and dedicated fanbase since it first aired on Nickelodeon in 2005. The animated series, set in a fantastical world where some people can manipulate the elements through martial arts, follows the journey of a young boy named Aang who must fulfill his destiny as the Avatar and bring balance to a world torn apart by war.
One of the reasons Avatar: The Last Airbender is considered the best cartoon of all time is its compelling and complex storytelling. The show deals with weighty themes such as war, genocide, and redemption, and its characters are fully fleshed out and multidimensional. The world-building is also top-notch, with a richly imagined culture and mythology that adds depth to the narrative.

Another reason Avatar: The Last Airbender stands out is its stunning animation and action sequences. The show's fight scenes are beautifully choreographed and exciting to watch, and the art style is visually stunning, with its own distinct aesthetic that sets it apart from other animated series.
Overall, Avatar: The Last Airbender is a must-watch for fans of animation and storytelling. Its thought-provoking narrative, fully realized world, and stunning action sequences make it a cut above the rest and cement its place as the best cartoon of all time.