lolz
I've just been spamming that endlessly. don't mind me.
For actual critique it's fortunate my brother is bad because i'm still used to this style of tech skill failure and not knowing what to do from stuff when he plays other characters.
Basically, with the Ics, your goal vs Falco is generally to knock him over or launch him in some manner so you can grab him. in fact that's pretty much your goal against most characters. because properly executed grabs are whole stocks.
wds should be your bread and butter. movement is one of the largest parts of this game. movement, and how you do it, is how you acquire your perfect spacing. it's how you keep yourself able to get into their space without being in range of their stuff. for ics this is wavedashing and wavelanding primarily, but also walking (super underrated), dash dance, empty sh, and all sorts of goodies. those, and l-cancel, should be second nature to you.
after l-canceling, being able to control your movement is the most important thing because it's what lets you control space. waveshielding is the ics' bread and butter. it is so good for them. their shield game, wd game, and punishment is what makes them as a character. you must learn how to move with them. your tech skill must be at least good to get use out of them. really strive in your matches to hit those wd f-tilts, wd u-tilts, l-cancel those sh ff bairs, shffl fairs.
don't focus on trying to out-defend him right now. you should be aggressing slowly and moving into his space. it's very important to know how to attack with any character, ic are no exception. similarly, learning to use waveshielding and whatnot offensively is another big part of them. shield approach is very useful. so is approaching so you have space and can hit them, and then waiting for them to do stuff so you can punish it.
your brother needs to be much more comfortable moving around the stage. for now it's important he gets his SHL up to par. for falco, spacing is different than spacing for most characters because it revolves heavily around platforms. he should look into Mogwai's training guide in the Falco boards because it covers what he needs to do.
For him, tech skill is going to be a major point to work on. He needs to SHFFL Aerials on shields with perfect consistency. He can't afford to miss those L-cancels. Good people will kill him for them. he has to get much, much more comfortable with that pistol, it's one of Falco's best moves. He also needs to learn how to space with it and keep a SHL length away.
But I don't know Falco intimately enough to help him beyond that. If you direct him to Mogwai's stuff (I think technomancer wrote something good on Falco stuff a while ago if someone wants to dredge that up) there's probably a lot of useful stuff for him.
For now just focus on being able to control your characters on the ground, though, and approach / retreat game. And while you do so, try to work on your technical consistency with L-cancels, wavedash, controlling your dd, etc.
