Poof that Tyson can be beaten in Punch Out!

I have heard of this. I have heard he was beatable. But when I couldn't do it while using a Game Genie, I began to lose hope. I landed more punches then him, caused more damage then him, and he still won by decision. But now I know he can be beaten.

You hear that Tyson! I know you can be beaten now! And it's only a matter of time before I put the cartridge into the NES and knock you out...With out cheating!.