Ring King © 1987 Data East USA, Incorporated.
North American version. For more information about the game itself, please see the original Japanese version entry; "Family Boxing [Model NAM-FB-4900]
Description from the back cover:
Challenge your friends or your computer to the Data East Championship Title Bout! Challengers from around the globe, each with his own style of boxing, knuckle up to take the title. Win by knock-out or points using a wild assortment of hooks, jabs, uppercuts, and combinations!