You aren't gonna like this but you gotta get reket a lot by very good falcos so you can go through the stages of getting good at the matchup. Stage 1. Learning what gets you rekt: roll, dash dancing defensively, getting stuck in shield, ect. Stage 2. Learning proper defensive options and getting less rely: di out of combos, learning oos options, when to shield grab, when not to. Stage 3. Recognizing how use movement to make falcos attacks bad and create openings: dash dance forward shield a dair get the shield grab, fade away fair oos, eat laser fair, fair before he can laser, fair out of pillar combos. Stage 4. Punish game. Once you see all the ways to create openings, you learn to maximize them and make life a living nightmare for that poor bird with clipped wings. I've started to feel bad for that poor guy. With his weight, and terrible recovery he has such a hard time against a punish heavy marth that can recognize unsafe options.