original question: how many Book Character has a Character Rank of [King Koopa]?
answer: 6
answer type: Book Character.
auxiliary information: Bowser, is a video game character and the main antagonist of Nintendo's Mario franchise. In Japan, the character bears the title of Daima≈ç. In the United States, the character was first referred to as "Bowser, King of the Koopa" and "The sorcerer king" in the Super Mario Bros. instruction manual. Bowser is the leader and most powerful of the turtle-like Koopa race, and has been the greedy nemesis of Mario ever since his first appearance, in the game Super Mario Bros. His ultimate goals are to kidnap and marry Princess Peach, defeat Mario, and conquer the Mushroom Kingdom. Since his debut, he has appeared in almost every Mario franchise game, usually serving as the main antagonist. Bowser has been called "the most successful video game character". Currently, Bowser is voiced by Kenny James. In addition to his usual animated and video game appearances, he was also portrayed by Dennis Hopper in the 1993 critically reviled live-action film, in which he was shown as the crooked and corrupt President/King Koopa, unopposed king and acting president of Dinohattan.
What is the the number of Book Character with a Character Rank of [King Koopa]?