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?

Context paragraphs:
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.

Connor Undercover: Connor Undercover is a Canadian Teen action-comedy television series airing on Canadian specialty channel Family.  It stars Max Morrow as the title character Connor Heath.  It is co-produced by Heroic Films Company and Shaftesbury Films.  In early 2010, Family renewed the series for a second season.

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.

Chuck Versus the Cliffhanger: "Chuck Versus the Cliffhanger" is the fourth season finale of the American NBC action-comedy television series "Chuck".  Aired on May 16, 2011, it is the season's 24th episode, and the 78th overall episode of the series.  The episode was directed by Robert Duncan McNeill and written by series co-creator Chris Fedak, along with Nicholas Wootton.  Despite the episode's eponymous cliffhanger ending, supposedly leading into a fifth season, it was anticipated that "Chuck" would be cancelled after the fourth season for declining viewership, making "Chuck Versus the Cliffhanger" the "de facto" series finale.  However, a fifth and final season was ordered on May 13, 2011.

Eagleheart (TV series): Eagleheart is an action-comedy television series that aired on the American programming block Adult Swim.  "Eagleheart" was produced by Conan O'Brien's production company, Conaco, and stars Chris Elliott as Chris Monsanto.  The series aired from 2011 to 2014.

Commander Safeguard: Commander Safeguard is an animated superhero produced by the Pakistani advertising agency IAL Saatchi & Saatchi and animated by Post Amazers.  The character is popular in Pakistan and in Mexico, where it is known as Capitan Escudo.  The superhero is depicted as a representation of Safeguard (soap) who fights and defeats the germs who are led by a character called "Dirtoo".  The cartoon was originally broadcast in Urdu.  It is one of the most popular children's animated television series in Pakistan.

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.

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.

The Dukes of Hazzard: The Dukes of Hazzard is an American action-comedy television series that aired on CBS from January 26, 1979, to February 8, 1985.  The show aired for a total of 147 episodes spanning seven seasons.  The series was inspired by the 1975 film "Moonrunners", which was also created by Gy Waldron and had many identical or similar character names and concepts.

The Itchy &amp; Scratchy &amp; Poochie Show: "The Itchy & Scratchy & Poochie Show" is the fourteenth episode in the eighth season of the American animated television series "The Simpsons".  It originally aired on the Fox network in the United States on February 9, 1997.  In the episode, "The Itchy & Scratchy Show" attempts to regain viewers by introducing a new character named Poochie, whose voice is provided by Homer.  The episode is largely self-referential and satirizes the world of television production, fans of "The Simpsons", and the series itself.  It was written by David X. Cohen and directed by Steven Dean Moore.  Alex Rocco is a credited guest voice as Roger Meyers, Jr. for the third and final time (having previously provided the character's voice in "Itchy & Scratchy & Marge" and "The Day the Violence Died"); Phil Hartman also guest stars as Troy McClure.  Poochie would become a minor recurring character and Comic Book Guy's catchphrase, "Worst episode ever", is introduced in this episode.  With "The Itchy & Scratchy & Poochie Show", the show's 167th episode, "The Simpsons" surpassed "The Flintstones" in the number of episodes produced for a prime-time animated series.

Supporting paragraphs: Bliss (The Powerpuff Girls) The Powerpuff Girls (2016 TV series)
Answer: April 4, 2016