I posted a message in the MK boards, but thus far no luck.
As for the match-up, Link should spam all day. Your bombs will beat his tornado, technically your arrows and boomerang can as well but need to be more precise with those two. Just use the bombs, it's easier to beat the tornado with them.
If you do get caught in the tornado you have a few options,
1) DI up pull a bomb and drop it.
2) DI up and Dair.
3) DIing out and throw any other projectile.
Metaknight can't Dair camp you, our Upsmash, and heck I think our uptilt, will beat it. Link has quite a few attacks that out range Metaknight, main problem is that Metaknight is much faster than Link. So Link needs to space right while keeping out of his range.
Key advice, if you get knocked off the stage, GET BACK ON ASAP!!! Metaknight has the best gimp game of anyone in the cast. We have one of the if not the worst recovery in the game. He will **** us off stage.
Stay on the ground, you'll do much better there than in the air.
Never let him take you to rainbow cruise. Stick to Norfair.
I don't know on a ratio, but I think the 80-20 MK the other thread had was a joke of a ratio. It's not that bad for Link, he can win the match-up.