TimeSmash
Smash Champion
Tethers aren't good options, they're very risky...
They're easily edgehogged and even if you grab the ledge, you can get hit before pressing up, which usually will make you lose a stock...
You never saw Olimar, Zero Suit Samus, Samus, Link or Toon Link getting hit while they do this?
Another thing: Luigi has a hard time doing OoS stuff like Shield Grab or punishing because his low traction pushes him backwards considerably...
Having the Poltergust as a grab would at least make the Shield Grab easier, as it's range would be bigger...
I never said it would be good haha. I wonder how much lag it might have though if it were a grab.