King Hippo is a fictional boxer from Nintendo's Punch-Out!! series. King Hippo first appeared on the Nintendo Entertainment System game Mike Tyson's Punch-Out!!, as the second competitor in the Major Circuit. Subsequent reviews have characterized King Hippo as one of the most iconic characters from the game. The character is featured prominently on the NBC Saturday morning cartoon, Captain N: The Game Master. His obese figure and his face both resemble those of a hippopotamus.