Okay. Since you play(ed) with Fly, why don't you get us started? Unless you want me to run everyone through spaced Fairs and Bairs...
You know, the stuff everyone already knows to do
Damn I was hoping I could get away with not doing any work =P Welllll mostly as Fly got better at the matchup I realized more things that I
shouldn't do rather than things that I should do... seems to be the case in a lot of my matchups so maybe that's a problem but here goes
Also keep in mind I haven't played a good ICs (fly/wobbles) in awhile so these aren't super fresh
...I don't like to throw out ftilts anymore, namely after whiffed fairs to cover myself or when ICs wavedash in, Fly CCs a lot of these since they're pretty standard and then runs forward and grabs me in my lag. I don't know what percent it starts to work but at low percents it gets you killed.
...I don't like to camp platforms
as much anymore because believe it or not ICs can catch up to you and can play a few tricks to get you hit... and this kind of percentage/time battle is kind of just as hard as your regular ground game
...Edgeguarding side B was never a problem for me, just CC dsmash/dtilt or interrupt early with fair. I wasn't quite sure why other people didn't like edgeguarding it but maybe it was cause they weren't sheik
...ICs shield game is not very good, nana tends to get hit a lot and they rarely fullhop (since it leaves them very vulnerable). So (assuming you are close enough to pressure their shield) they are almost always wavedashing backwards or rolling. wavedash back is not easily punished but it puts them near the ledge, which is even worse of a bad position for them since they can't wavedash much anymore.
...Kind of theorycrafting here but I believe that Sheik's side of the matchup depends heavily on shield poking. mostly because their shield game is so bad and because that seems to be the least risky way to add damage. Also their shield isn't very good and they have to use it a lot so it's usually diminished
...Like many of sheik's other matchups, the hard part is adding damage at the early stages of each stock since your options are so limited during this time. As the damage gets higher the matchup becomes exponentially easier as you have tons of ways to approach/attack/interrupt/defend yourself.
... if you can dash attack them at mid percent they should die, ICs are the perfect combo weight
...if they up B kill the main character since even if you kill nana you can still get chaingrabbed. no matter what you're always susceptible to a 0-to-death
...I guess what i would try to do was approach with short hops and try to bait out a wd forward uptilt or wd forward upsmash then punish that. but i always got too greedy and tried to beat their wavedashing approaches which is hard cause they move fast, i should've been more patient and played a positioning game until i could get close enough to pressure their shield and win that way. Once you get to their shield you need to punish every escape option they try because that's the only way you're going to get any damage in.
.. I don't bair much cause I don't like how it doesn't hit low that easily but everyone tells me to bair more... so i'm probably doing it wrong. It's also bad to jab, dsmash, and dash attack cause they all can get you grabbed fairly easily