OnFullTilt
Smash Apprentice
So while messing around a while back I saw that Luigi's grounded B reverse makes him slide a decent distance. Though it is difficult I think it is quite possible to use this trick to sneakily get in some fireball damage or even a misfire. To see what it looks like watch this https://www.youtube.com/watch?v=xkSF3ZK3J7w (sorry for the phone quality, it is all I have right now). I think this could let you do some crazy stuff like to (maybe) even WD through someone's shield and then do a crossup misfire. Yes, I just said crossup misfire.