release, Cartoon Network also released animated promos done by Klasky Csupo, the animation studio behind many Nickelodeon original shows, such as Rugrats, Aaahh!!! Real Monsters, The Wild Thornberrys, Rocket Power, As Told by Ginger, and All Grown Up!. Sam Register originally pitched the idea of Puffy AmiYumi having their own television series on Cartoon Network, and afterwards, Renegade Animation developed a test short on April 22, 2003 in hopes of making the channel greenlight the show's production. Renegade Animation originally, at first, created other Cartoon Network pilots before Hi Hi Puffy AmiYumi; two of which feature Captain Sturdy; one in 2001, entitled "Back in Action", and the other in 2003, entitled "The Originals", but they were ultimately rejected, and Renegade Animation then started working on Hi Hi Puffy AmiYumi starting with its pilot on April 22, 2003. The pilot was not broadcast, but was initially successful, and got the green-light from Cartoon Network. Finally, it was shown in non-full version as a preview on Cartoon Network DVDs and VHS tapes. The entire pilot was found by series' director, Darrell Van Citters, and was uploaded to Vimeo on April 5, 2018. The series was officially announced at Cartoon Network's upfront on February 26, 2004. It was originally planned to premiere in December 2004, but was later pushed back to November 19. Cancellation On October 2, 2006, the show's crew announced on their blog that Cartoon Network had cancelled Hi Hi Puffy AmiYumi after three seasons and 39 episodes due to management shakeup, leading Sam Register to leave the channel, until Register officially became the president of Cartoon Network Studios on August 28, 2020. Appearances in other media The show had been acknowledged and referenced several times, even outside of Cartoon Network themselves. These also come in the form of parodies, albeit rare. A clip of the episode, "AmiYumi 3000", can be seen playing on a TV in the film Nancy Drew. In 2012, Ami and Yumi appeared on Cartoon Network's 20th anniversary poster. Yumi later made a cameo appearance in the OK K.O.! Let's Be Heroes special Crossover Nexus. Ami and Yumi made a background appearance, within their poster in a TV pilot for Villainous. Ami's haircut appeared as a wardrobe item in the 2020 mobile game, KleptoCats: Cartoon Network. Parodies of Ami and Yumi, named Ori and Yori, show up in the Nickelodeon series Kappa Mikey. Episodes Hi Hi Puffy