ThunderCats (comics) are held prisoner in Castle Plundarr while Wilykit and Wilykat are the personal servants of Mumm-Ra. This storyline was distinctly more mature than many episodes of the series, with much harsher language such as "bastard" used by Mumm-Ra. Cheetara is depicted as holding a grudge against Lion-O for "abandoning" his friends and leaving her to be abused by the Mutants and WilyKat's corruption in the earlier mini-series takes greater form. Realizing he has betrayed his friends, the older cub flees when the mini-series concludes. Lion-O and the ThunderCats emerge triumphant over Mumm-Ra once again. By the third mini-series, "The Dogs
What a Cartoon! ended on June 1, 2008. In 2007, reruns of "What a Cartoon!" played briefly on Cartoon Network's retro animation sister channel, Boomerang. "What A Cartoon!" is the 1st short cartoon incubator created by Fred Seibert. Starting with WAC! 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