To Falconv1.0: Well, according to the MK match-up guide, they think that Kirby is a slightly tough opponent. Yes the match-up 55:45 in MK's favor, but they still consider it to be fairly close to a neutral match-up in their opinion. This is probably because Kirby is one of the very few characters that can hit MK out of an aerial attack with a well timed Bair. If the Kirby player is good at doing that, it forces the MK player to have to use a grounded approach to get to Kirby. Although, a well timed F-tilt can attack Kirby out of his Bair. Also, MK can always just use the ^B to shut down Kirby's Bair approach completely. Also, Kirby can hit MK out of the tornado 2 different ways so its use in battle is limited. Well, I'm just following what they say because I haven't really had any good matches for a LOOOOONG time. (Stupid Wi-Fi...) That's just my opinion anyway. Probably more people will agree with you because you seem to be fairly confident about this and you seem to be a more experienced player than I am. But then again, I can't tell what's going on in people's minds around here because I only registered here about 2 weeks ago and you actually may be messing around. But IDK that.Kirby does not go even with MK, why the hell do you people continue to say instead of using a character with advantages in the match up use the character who has nothing on MK.
ANYWAY to pkblaze: For your first question, a good MK player when against a Kirby won't choose to fight in the air much and generally want to have a grounded game against Kirby. They can still choose to attack you from the air if they want, but they'll stay grounded most of the time against Kirby entering the air only when necessary because of Kirby's Bair.
Anyway yeah, I've only done this about two times. I'm a bit foggy on the details, but I think that Kirby has to either fast fall his Bair or do it while he is rising. Not quite too sure about the timing. Try that first and tell me if it worked or not. From the guide I looked at, they confirmed that a Short Hopped Fair (MK) can be beaten out of by a rising or a fast falled Bair (Kirby). BTW, I've got more interesting information for you Kirby users/mains: Kirby's Bair can attack an approaching tornado if it hits at a certain point close to the top. (Again, don't quite remember where.) A grounded shuttle loop is capable of shutting down Kirby's Bair approach. Lastly, at maximum inhale range, shuttle loop will hit Kirby so be aware about that.
For your second question, I'm not quite sure what you mean about Pseudo USmash. From what I researched, it was a technique that only existed in Melee. Not even these forums mention that you can do it in Brawl. Are you sure it's called this? You'll have to inform me about how it's done if I can answer this question for you... Maybe someone else knows about this? FYI, I haven't really started looking at AT's yet, so IDK if it falls under that catergory. You'll have to ask somebody else that last question because IDK what a Pseudo USmash is. Sorry about that. Also, I don't use Snake, (In my earlier post, I mentioned that I suck at using him well.) so that's pobably why IDK what a Pseudo USmash is. I'm good at using Marth however so I THINK I can still help you with this question if only you tell me what a Pseudo USmash is.