Exceladon City
Smash Hero
And it means they can kill us at around 35% with a jab-upb, or 70% for an up-angled fsmash. So even if Fox's usmash will kill at around 75% on him, he has kill moves too, and, combined with our light weight, makes this a bad place for us. Oh, and he has Rising nair, which is FAR more priority than Fair, will kill around 80% when you stand on the platform (maybe about 60% higher up) and has 3 (!) frames from when the button is pressed to the hitbox coming out. You may want to rethink your advice. Anyways, pretty much whatever stage Fox chooses, Luigi will have an advantage.
You can powershield the jab and the up+b and at K.O percents you play it smart. DUH. I live to like 100+ because I don't get stupid and try to fight him head-on at K.O percents. I know the Luigi match-up because one of my good friends mains him and plays him pretty textbook and I secondary Luigi so I know what I'm talking about.