As a comicbook character, Boomfist seems to be a reference to many existing popular superheroes, especially long-standing characters; He has a tragic back story (like Batman and Superman but slightly more dramatized), over-dramatizes, speaks in quips, fights a villain that is just as silly as him, belongs into a league of heroes, tries to get kids into being his sidekicks (as seen by June and Ray Ray) and spouts morals that go against any parental logic. As such he is probably a parody of superhero comic books from the nineties. Many of his hero allies also appear in cameos on tv screens seen in the show.
He is voiced by Dee Bradley Baker.
He appears in Bada Bing Bada Boomfist (season 2) and Sealed with a Fist (season 3). There are videogame versions of him appearing throughout the show as well as a burger joint in a Bigfoot village in Feets Too Big.