Heh... funny how many characters I keep hearing are "the best" at edge guarding MK...
Can't say I've played good enough Snakes to have too much of an opinion on this match-up, and while I agree with some of what was said, here's a few comments on the OP:
-Come on now, MK does **** Snake in the air. Well, a careful MK anyway. His aerial attacks come out MUCH faster than Snakes, and, at least against the Snakes I've played, it is very easy to predict when they are going to use an aerial. Sure, you can pull out a grenade, but if you do that in the air, you can't shield it, so you're going to blow up too, and, depending on the percentage, it can be worse for Snake than MK or vice versa. Also, I'm not certain, but I *believe* MK's Uair is fast enough to hit between the kicks on Snake's Nair like Shiek's Nair does.
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Maybe I'm missing something, but how is this an edge guarding technique? Also, a lot of your edge guarding strats assume he will UpB every time. While that is a very great strat MK tends to use, after the first or second time being countered, he's going to switch it up.
-I'm kind of surprised you didn't mention Brinistar at all. That stage is an amazing Snake stage.
Also, this is probably a ******** question, but since I can't find it anywhere, what is the snakedash?
Finally, does MK's Bair outrange Snake's Ftilt?