What makes you think Ryu's cheap tricks will work on Link? Link is not from the SF Universe.
Ryu can pound all he wants on the mirror shield in an attempt to break it. He will get impaled on the Master Sword while he is trying.
True it's a gameplay mechanic. Which Link are you talking about? Wind Waker? I almost always talk about OoT Link. In OoT Link does get a powerup that doubles his resistance to damage. That's a gameplay mechanic, but I'm willing to say that his stamina is at least twice that of a human's.