Well then, this would probably end in a draw....if DK didn't have bombs. Still, I will continue.
As bad as some injuries may seem at first glance, they aren't really that painful or fatal as they may seem. There are times when people won't even realize that they have been stabbed or shot.
This also applies to fatal wounds. When we hear that phrase, we inmediately think of "drop-dead instantly". That's definetly not true at all in the real life. When injured in a vital organ, there are still a good 1-2 minutes FOR YOUR AVERAGE HUMAN BODY to continue normal bodily functions before collapsing. This would mean that even a normal guy, like Ike, could get stabbed in the heart by Roy and still would have a good 2 minutes to kill Roy. Then he drops unconcious and dies if not treated.
How does this apply to DK? Well, even if Roy stabs him in a fatal spot, he could still be capable of grabbing Roy's sword, throw it away and then crush him with his monkey arms. Then he dies 4 minutes later. The match ends with both dead and in a draw.
Mind you, there ARE insta-incap spots in the body, namely the brain and the spinal cord. Those are the only places were a stab will most likely kil DK instantly. This would seem like a huge problem, but then I noticed the way DK and gorillas in general position themselves:
Unless stabbed from above or below, or from the sodes Donkey Kong's cord is very protected from damage thanks to that way of standing. And he could just keep facing Roy, never showing his vitals. Make a wall.
Granted, there is still the brain, but unless Roy stabs the eyes he won't be able to reach it. Rapiers are made to stab the weak links in armour, not to break it or pierce it directly. Also, I doubt Roy has the skill to aim for the eyes and stab him there constantly, and even when he stabs him, DK won't just stand there. Body reflexes will make him turn his head or move, making the stab miss the brain. Therefore, the skull should offer enough protection for his Brain.
So DK could simply get close to him, play defensive and intelligently, like the smart ape he is. Just like in jungle beats, but in a different position. Use his martial arts skill until worse comes to worst. Throw dirt at Roy's eyes, like apes do. Play dirty until the mammalian being's posterior waste collides with the ventilation device. If **** hits the fan and he gets stabbed, he could use his final moments to say "SCREW IT!" and crush Roy.
Then he dies.
This is without taking the bombs into consideration. With bombs, DK only has to do the above if he gets really unlucky.
Also:
please watch the video:
http://www.youtube.com/watch?v=c68sAnJkGzc&feature=related
These are pirate grenades. Not fruit bombs.