Mao Mao: Heroes of Pure Heart is an American animated television series created by Parker Simmons for Cartoon Network. Produced by Cartoon Network Studios and Titmouse, it premiered on July 1, 2019. The show is based on the independent teaser short I Love You Mao Mao, which Simmons had initially produced for the annual Titmouse Inc. "5-Second Day" on February 21, 2014 and subsequently posted on Newgrounds. The series was renewed for a second season on July 23, 2020.On January 1, 2021, Mao Mao: Heroes of Pure Heart was added to the HBO Max streaming service. On August 18, 2022, it was removed from the service as a result of the Warner Bros. Discovery merger despite the second season renewal. Cartoon Network subsequently removed all references to the show from their official websites, YouTube channels, and Twitter feeds. On October 14, Cartoon Network restored videos of the show to their YouTube channel and references to the show on their Twitter.