RT
Smash Hero
Lasers...you can crawl under them if they aren't grounded. You can slowly walk and shield/powershield/spotdoge them. You can airdodge them. Lucario doesn't have any move that can stop it other than attacking Falco. Be careful about silent lasers, because if you get hit with one, expect a usmash/grab/some other followup. If the Falco is mindlessly shooting lasers, you can usually throw an AS and hit them before they can react.
Oh, and don't DT them. The Falco will just run/Phantasm away and shoot some more. You accomplish basically nothing.
Oh, and don't DT them. The Falco will just run/Phantasm away and shoot some more. You accomplish basically nothing.