Show. In this new format, it aired reruns and new episodes of the full-series Cartoon Cartoons, as well as new Cartoon Cartoon shorts and old WAC! shorts. From 2000 to 2001, the pilot shorts appearing on the network's viewer's poll that lost to The Grim Adventures of Billy & Mandy and Codename: Kids Next Door (except for Whatever Happened to... Robot Jones?) were added to the anthology. The show continued to air until October 16, 2003, when it was temporarily dropped from the network's schedule. On September 12, 2005, The Cartoon Cartoon Show was revived, this time as a half-hour program featuring segments of older Cartoon Cartoons that were no longer shown regularly on the network, such as Cow and Chicken, I Am Weasel, and others. Some Cartoon Cartoons were moved exclusively to this show and the Top 5, though there was also some overlap with shows that already had regular half-hour slots outside the series. In 2006, the programming was expanded to also include non-Cartoon Cartoons that were regularly shown on the network, such as Foster's Home for Imaginary Friends, Camp Lazlo, My Gym Partner's a Monkey, and Squirrel Boy. The show ended on June 21, 2008. In 2007, reruns of What a Cartoon! played briefly on Cartoon Network's retro animation sister channel, Boomerang. In 2020, a selection of shorts were added to the Cartoon Network website and app. Legacy What a Cartoon! is the first short cartoon incubator created by Fred Seibert. Starting with What a Cartoon! and continuing throughout his cartoon career, his Frederator Studios has persisted in the tradition of surfacing new talent, characters, and series with several cartoon shorts "incubators," including (as of 2016): What a Cartoon! (Cartoon Network, 1995), Nickelodeon/Nicktoons' own Oh Yeah! Cartoons (1998), Nicktoons Film Festival (2004), Random! Cartoons (2008), The Meth Minute 39 (Channel Frederator, 2008), The Cartoonstitute (Cartoon Network, 2009/unfinished), Too Cool! Cartoons (Cartoon Hangover, 2012), and GO! Cartoons (Cartoon Hangover, 2016). These laboratories have spun off notable series like: Dexter's Laboratory, The Powerpuff Girls, Johnny Bravo, Cow & Chicken, Family Guy, Courage the Cowardly Dog, Samurai Jack, The Grim Adventures of Billy & Mandy, Codename: Kids Next Door, The Fairly OddParents, My Life as a Teenage Robot, Nite Fite, The Mighty B!, Fanboy & Chum Chum, Adventure Time, Regular Show, Bravest Warriors, Secret Mountain Fort Awesome, Gravity Falls, Bee and PuppyCat, and Uncle Grandpa. Dexter's Laboratory was the most