Already getting whining online at Anther's about Lucas PK Fire. lol.
I honestly believe it is just a result of Lucas and Ness annoyingly saying "PK FIRE" every time. Mario, Pika players, for example, throw much more fireballs/thunderbolts than any Ness or Lucas player does PK Fire.
Question for Shamrock and anyone else dabbling with Lucas- How do you effectively punish? Having the worst grab in the game and no attacks that hit behind you, it's incredibly difficult to get hits in even when you have a hard read. Matchups against captain falcon are particularly bad, as I can't punish his fairs or rolls, and his jab comes out even faster than Lucas'. Any input is appreciated!
When they short hop towards you, use pk fire. Use your snake tether to approach. One of Lucas' best, most underutilized moves I've seen in the game is his dair. It is pretty safe, throws people off, and eventually spikes so you can use it as a set up on the ground into other combos. Don't short hop the dair, too much landing lag. do a full jump Dair, but the range is good enough that it will still hit most characters on the ground by the last few hits. Your jab attack actually hits very close to the body, almost behind you. Nair is pretty unsafe, so be careful when you bust it out. Obviously you have to be smart with grab.
edit: your ftilt has very good range too.