Stallone, who is not an actual boxer, is pictured above fighting Dolph Lundgren, also not an actual boxer. But ending the Cold War was a moment that transcended the sport, and surely qualifies him as one of the all-time greats. Mike Tyson, Julio Cesar Chavez and Kostya Tszyu, all actual boxers, were also inducted, but they're mere afterthoughts to Rocky himself.
And to answer the above question, the IBHOF is located in Canastota, New York. And if you knew that, you must be one of the 4,425 residents of Canastota. Or one of the fewer number of boxing fans.
Well, today was fun. Now scram.