Bowser, or King Koopa, is a fictional character and the main antagonist of Nintendo's Mario franchise. In Japan, the character bears the title of Daimaō. In the U.S., the character was first referred to as "Bowser, King of the Koopas" and "The sorcerer king" in the instruction manual.

Make him have a Low gravely voice. or your regular voice and add an effect on it.