i think "The Battle Memory" would totally be a better name for this thread.
anyway
in this MU, link's bomb use is limited - he can't haphazardly throw them out at Lucas.
that's not to say that he can't camp Lucas, he does, but his options are slightly limited in this sense, therefore it's easier to predict his next action and you should capitalise on that.
like all campy characters, you just have to be really patient and try to minimalise your damage. once you get into midrange it's not safe for him to keep camping so he'll either run away or engage. PKF cancels boomerang and i think it ignites bombs. not sure about arrows but you wouldn't want to PKF them anyway.
once you get in, you have to be mindful of what you do - what Links will do offensively from a shield is grab, Up-B or drop it and Jab/Utilt. if you hit his shield with nair or dair, try to land them as far as possible behind him. if you time Dair perfectly he shouldn't be able to drop shield and Utilt it. do not land Jab3 on Link's shield. Zair and SHPKF are safe on his shield.
some players are really twitchy with their grab button. they're the ones that try to shieldgrab everything you do. Lucas has the tools to bait this and punish. Land Nair/Dair behind shield, or FF Zair and spotdodge/roll. Dair autocancels and Nair/Zair have minimal landing lag. If they miss a grab at point blank range, that's a free grab or Usmash if you react fast enough.
link pretty much kills with his entire moveset so once you reach 80% you have to start worrying because a tipper dash attack will take you out right there. what most links use is Ftilt/Utilt, but Uair and smashes also have to be watched. the best way for us to kill Link is probably a gimp. PKT1 is good for this, since it doesn't actually have (substantial) knockback- if he gets hit, he just starts falling and even half a second of him going "whaa?!" is enough to gimp him.
also, PKT1 can really screw up Up-Bs. if any of you other brawl Lucas mains know what happens when you PKT1 dolphin slash and Marth just flies up like in those freak TAS SDI vids, that happens here too. you could Bair/Dair spike Up-B as well, but PKT1 is free damage and you won't get gimped if you screw up.
Also if a Link Dairs your shield and bounces off you can get OoS Usmash off it if you react very fast If he FF Dairs and just lands on the ground, that can be Usmashed as well.