I've never seen a Link do much more than get 1-stocked by a good Falco, and my experiences have been pretty similar.
But then Lucario would be a very easy MU for me because I am familiar with him playing him.
Overall I think the four easiest MUs from top three tiers would be ICs, Marth, Snake and Wario. IC players tend to be a little nervous about the bomb-hold CG thing, even though they have a clear advantage. The other three are the only ones who don't have a legitimate CG or infinite of some sort on Link, and any character who has a CG on him leaves a clear gap in skill level needed to win compared to characters w/o. Marth, Snake and Wario have an advantage on Link but they have things like subpar gimping games or more limited damage-racking abilities compared to the other top tiers that brings things down into a more human plane.
EDIT NINJA'D BY KYRO
What a wonderful question.
You need c-stick set to smashes to do this.
When you are in the animation of pulling out a bomb, press and hold down the A button. Then attack using the c-stick.
You can also set the c-stick to smashes to pull off DACs and bombslides although I think both of those ATs are neglected as irrelevant these days. Learning how to throw bombs in any direction via jump cancelling is a much more reliable AT to learn anyways.
For a full list of EVERYTHING that Link can do and how to do it,
check out the Secret Sages Thread. It's darn useful stuff. (Okay, I actually think most of it ISN'T, but it really depends on your playstyle. But at least knowing most of the ATs can give you a small edge throughout a series of matches.)
Rizen, Utah is having an anime convention around May 10-12th and they've agreed to host a regional for Smash. You should totally come and help me rep Link. And then we could meet and have friendlies, etc. It'd be freaking awesome.
And everyone else who could make it. But I know Rizen is relatively close.
The cost is $20 a day and $10 a tournament, I think it's like $30 for a three day pass. They're expecting the tourney to take multiple days as more people enter.
You guys can visit the website here if you're interested.
Hype hype hype