Here's a list of stuff from Cartoon Network and Warner Bros. that have not aired on American cable TV in years:
-Dexter's Laboratory: Ego Trip- has not aired since it last aired on Boomerang on May 9th, 2015.
-¡Mucha Lucha!: The Return of El Maléfico- has not aired since it last aired on Cartoon Network on December 2009.
-The Grim Adventures of the KND (Codename: Kids Next Door): has not aired since October 2011.
-Ben 10: Destroy Aliens- has not aired since July 2017.
-Billy and Mandy's Big Boogey Adventure: has not aired since it last aired on Boomerang on May 16th, 2015.
-Codename: Kids Next Door- Operation: Z.E.R.O.- has not aired since it last aired on Boomerang on April 2018.
-Animaniacs (1993): has not aired since The Hub Network became Discovery Family on October 2014.
-Regular Show: The Movie- has not aired since January 2016.
-Tweety's High Flying Adventure: has not aired since it last aired on Cartoon Network on December 2009.
-Quick Draw McGraw: has not aired since November 2012.
-Ed, Edd n Eddy's Big Picture Show: has not aired since its premiere on Boomerang on March 7th, 2015.
-Bah Humduck! A Looney Tunes Christmas: has not aired since it last aired on Cartoon Network on December 2009.
-The Powepuff Girls Movie: has not aired since it last aired on Boomerang on July 12th, 2015.
-Destination Imagination (Foster's Home for Imaginary Friends): has not aired since it last aired on Boomerang on April 2018.
-Operation: I.N.T.E.R.V.I.E.W.S (Codename: Kids Next Door): has not aired since it aired on Boomerang for only two times on April 2018.
Stay tuned for the list of shows that have not aired on Cartoon Network's channel in years.