Question: On what date did this series premier that is an American animated superhero action-comedy television series and stars a fictional character named Blisstina Utonium?

full_context: Document 1: Ben 10 (2016 TV series): Ben 10 (often referred to as Ben 10 2016) is an American animated superhero action-comedy television series and a reboot of the Cartoon Network series of the same name. The series had its world premiere in Australia, New Zealand and Asia-Pacific on October 1, 2016, and premiered in the United States on April 10, 2017.
Document 2: The Powerpuff Girls Movie: The Powerpuff Girls Movie is a 2002 American animated superhero action-comedy film based on the Cartoon Network animated television series of the same name. The film was directed by series creator Craig McCracken, and was released in theaters on July 3, 2002, by Warner Bros. Pictures. It is a prequel to the series that tells the origin story of how the Powerpuff Girls were created, and how they came to be the defenders of Townsville. In theaters, a "Dexter's Laboratory" short titled "Chicken Scratch" was shown prior to the film, which later aired as part of the series' fourth season.
Document 3: Nicole Bouma: Nicole Bouma is a Canadian voice actress who works for Ocean Studios in Vancouver, British Columbia, Canada. She is best known as the voice of Mint Blancmanche from the Galaxy Angel series, Blossom from Powerpuff Girls Z, and Mai from Popotan.
Document 4: List of Powerpuff Girls Z characters: The following is a list of characters who appear in Powerpuff Girls Z, an anime version of "The Powerpuff Girls". Where appropriate, Japanese names are on the left whilst names from Ocean Productions' English language dub are on the right.
Document 5: List of Powerpuff Girls Z episodes: This is a list of episodes for the anime series "Demashita! Powerpuff Girls Z". It ran for 52 episodes on TV Tokyo from July 1, 2006, to June 30, 2007. The English adaptation of the show has begun airing in English-speaking markets but has not made it to U.S. shores. All 52 episodes have been translated into English.
Document 6: List of Tokyo Mew Mew characters: The Mew Mews are led by the main character, Ichigo Momomiya, whose first task is to gather the other four Mew Mews: Minto Aizawa, Retasu Midorikawa, Bu-Ling Huang, and Zakuro Fujiwara. As the series progresses, Ichigo goes from having a crush on Masaya Aoyama to becoming his girlfriend while trying to hide her secret double life from him. The series antagonists include three aliens, Quiche, Pie, and Tart, and their leader, Deep Blue. Originally from Earth, the aliens were forced to leave long ago due to deadly environmental changes. They have returned to kill the humans, who they feel are destroying their planet, and reclaim the planet. In "a la Mode", middle school student Berry Shirayuki is introduced as the sixth Mew Mew and, in the absence of Ichigo, the temporary leader of the Mew Mews. "A la Mode" also introduces new set of antagonists, the Saint Rose Crusaders, a group of human teenagers with various psychic abilities with a desire to create their own utopia. Led by Duke, they make several attempts to kill Berry, eventually turning the local populace against the Mew Mews.
Document 7: Natalie Palamides: Natalie Palamides (born January 6, 1990) is an American actress, comedian and writer who has been known for appearing on BuzzFeed. She has written "My Name Is Vivienne," "Freaks of Nature" and "Burning Bridges." She stars as Buttercup in the new "Powerpuff Girls" series that airs on Cartoon Network. The show was released in April 4, 2016 in the United States. She reprised her role as Buttercup in the "Uncle Grandpa" episode "Pizza Eve" during the Grampies short. Palamides has played Kathy Murch in the comedy-horror film "Freaks of Nature" in October 30, 2015.
Document 8: Powerpuff Girls Z: Powerpuff Girls Z (Japanese: 出ましたっ!パワパフガールズZ , Hepburn: Demashita! Pawapafu Gāruzu Zetto , lit. They're Here! Powerpuff Girls Z) , known in some other countries as PPGZ for short, is a Japanese magical girl anime series directed by Megumu Ishiguro, based on the American animated television series "The Powerpuff Girls". The anime is co-produced by Cartoon Network Japan and Aniplex and was animated and produced by Toei Animation, featuring character design by Miho Shimogasa ("Cutie Honey Flash", "Ultra Maniac"). As production occurred in Japan, Craig McCracken, the original creator of "The Powerpuff Girls", was not directly involved with the project.
Document 9: Super Hero High: Super Hero High, also known in United Kingdom as DC Super Hero Girls: Super Hero High, is an American animated television special based on the television series "DC Super Hero Girls" created by Shea Fontana, based on the characters published by DC Comics.
Document 10: Bliss (The Powerpuff Girls): Blisstina Utonium, better known by the nickname Bliss, is a fictional character created for the 2016 series "The Powerpuff Girls" in the TV movie "Power of Four" released in 2017. She was marketed as the fourth Powerpuff girl and was met with mixed reactions from fans and critics. The character has been widely interpreted as being black and to a lesser degree hispanic.
Document 11: DC Super Hero Girls: Super Hero High: DC Super Hero Girls: Super Hero High (also known as "Super Hero High" in United States) is a 2016 American animated Superhero family Comedy-drama television film based on the "DC Super Hero Girls" franchise. It was created to promote the new "DC Super Hero Girls" franchise and aired on Boomerang on March 19, 2016 in the United States as well as on Boomerang UK on May 21, 2016 in the United Kingdom and Ireland. Also, Cartoon Network aired this show again on April 30, 2016 and June 5, 2016 in the US and has subsequently made it available on its website.
Document 12: DC Super Hero Girls: Hero of the Year: DC Super Hero Girls: Hero of the Year is a 2016 American animated direct-to-video Superhero family comedy-drama film based on the "DC Super Hero Girls" franchise, produced by Warner Bros. Animation. It is the first film in the "DC Super Hero Girls" franchise. The film premiered at the San Diego Comic-Con International on 24 July 2016, was released on Digital HD on 9 August 2016 and was released on DVD on 23 August 2016.
Document 13: The Powerpuff Girls: The Powerpuff Girls is an American superhero animated television series created by animator Craig McCracken for Cartoon Network. The show centers on Blossom, Bubbles, and Buttercup, three girls with superpowers, as well as their father, the brainy scientist Professor Utonium, who all live in the city of Townsville. The girls are frequently called upon by the town's childlike and naive mayor to help fight nearby criminals using their powers.
Document 14: List of The Powerpuff Girls episodes: "The Powerpuff Girls" is an American animated television series created by Craig McCracken for Cartoon Network. The series began as a student film called "Whoopass Stew", made by McCracken while he attended the California Institute of the Arts in 1992. Two additional shorts, "Meat Fuzzy Lumpkins" and "Crime 101", later aired on Cartoon Network's "World Premiere Toons". The series officially premiered on November 18, 1998, lasting 6 seasons with 78 episodes total. A Christmas special and a 10th anniversary special were also produced. Episodes of "The Powerpuff Girls" have seen numerous DVD and VHS releases as well. The musical episode "See Me, Feel Me, Gnomey" was never aired in the United States, but was broadcast on YTV in Canada as well as in other countries, and is included on the complete series DVD box set.
Document 15: The Powerpuff Girls (2016 TV series): The Powerpuff Girls is an American animated superhero action-comedy television series and a reboot of the Cartoon Network series of the same name. It was first announced in June 2014; a year later, it was announced that it would feature new voice actors for the main characters. The series premiered on April 4, 2016, in the United States, Latin America and Brazil, April 19 in Italy, and April 25 in the United Kingdom.
ground_truth: April 4, 2016