That version of Punch-Out is pre-release too, it has a bunch of differences.

Ok. I just finished playing all the way through the gold Punch-Out!! Special. You beat Super Macho Man for the World Circuit title and that's the end of the game. There's a newspaper that says "World Champion," etc. and then the game scrolls through each of the fighters that you beat, and then the final screen shows Mac, his wins/losses/KOs and "THE END". That's it.

Everything else about it seems pretty normal, including the difficulty level of each fighter. There are slight color variations from the other versions and the music on the screen that flashes TITLE BOUT is different.