Avatar: The Last Airbender is an animated World Series.
Avatar : The Last Airbender ( Avatar : The Legend of Aang in some regions ) is an American animated television series that aired for three seasons ( referred to as `` books '' in each episode 's title card ) on Nickelodeon from 2005 to 2008 . The World Series is the annual championship series of Major League Baseball ( MLB ) in North America , contested since 1903 between the American League ( AL ) champion team and the National League ( NL ) champion team .