Luigi wins by doing absolutely nothing.

Years ago when I played Smash all the time with my friend we noticed Lv9 CPUs would kill themselves VERY often. Lv9 just makes them sporadic, I guess trying to somewhat emulate ''twitchy'' skilled play, but they can't quite pull it off. I believe it was like 7~8 that has them performing at their best.

Lv9 really just pumps them with caffeine and they go full retard, so I can definitely see a lot of those being totally legit.

Edit: Would have been better to end the video with Luigi vs Luigi as the final match and they tie somehow.