Greatest Heavyweights 
Sega Genesis
Sports - Boxing
 
Eight World Heavyweight Champs Answer the Bell in this ultimate showdown to decide who's #1! Muhammad Ali, Jack Dempsey, Joe Frazier, Larry Holmes, Evander Holyfield, Joe Louis, Rocky Marciano, and Floyd Patterson - all in their prime and looking for knockouts! Each Champion looks and boxes in their signature styles. It's Ali's speed against Marciano's power, Holmes' stinging jab versus Frazier's devastating hook!