Too funny, I remember that code too. I don't think that I ever beat him though.
I beat him once when I was a kid. I never knew anyone that could beat him on a regular basis. It was always 1ce or 2ce and that was your claim to fame. I used to love that game. Now when I play I can't get past the first 1:30.
I actually still play the Arcade version a lot. When you Fought Vodka Drunkinski and Pizza Pasta and the final guy is Mr. Sandman.
EDIT ADDITION:
Holy shit...My Inner Geek just popped out.
I beat him {Tyson} in a decision a couple of times.
It was supposedly impossible (not in the game code) for him to be able to get knocked out. According to a soft backed NES code book, that I believe had a green or red cover, obtaining over 5,000 points was the break over to win the decision over Tyson. Fortunately I no longer have that book, but I believe most of the information above to be accurate.
Brandon