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?
Sentence (from "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.
Relevant evidence: Yes