Yay! It now says Luigi!
I feel like this MU may have gotten better for Zelda in SSB4 than it was in Brawl. Probably not by more than a tiny bit, though.
I don't claim know all about Luigi, buts here's what I've got.
Pros : Range! Similar to Mario, we can outrange him in multiple moves, Ftilt, Jab, Fsmash, and even the front side of Dsmash and our Grab outrange some or most of his ground moves.
We can kill him on the earlier side of the spectrum with FW Elevator, so Luigi will need to be very careful about on shield safety at around 80% and up (Or as low as 60% If you can manage to stay alive until around 100% and get good rage boosts.) as to not accidentally let himself get taken to the top floor. All of our other high KB moves will also appreciate Luigi's lighter weight as an aid to KOing earlier.
Luigi has low-ish mobility. We acually have better air speeds than he does, and his run speed is only average. We can use this to try and shorten possible juggle attempts. Also, his fireball doesn't pose the same threat that Mario's does. We can atually use FW to reflect it if we want without getting annihilated.
Luigi may be one of the MUs where Din's actually has some utility. As mentioned already, Din's can be somewhat useful against a recovering Luigi. Din's cancells out Luigi missile as a bonus.
Phantom also appears to be more useable for edgeguards and for fireball blocking. Still though, use these two sparingly, they're still the unfortunate moves we know and
hate love.
Cons : Do NAWT, get grabbed. Luigi has some of the most impressive easy damage grab combos. Getting grabbed at almost any percent can lead into a followup. An easy 30% is lost off of an early grab. Don't let him have that advantage if you can. Luckily for Zelda, his grab as mentioned by busken, is rather short ranged. You'll want to try and challenge it with either Dtilt or Dsmash (Her fastest ground options.) and break the grab as he grabs you. You'll only suffer 3% instead of 30% if you can.
While his aerials do not have lots of range to show off (Somewhat like Zelda's.) NAir packs impressive combo breaking abilities, and the rest of his aerials contain useable properties such as KO power or good frame data. I recommend not trying to go against him in the open air.
Luigi can kill, and we are light. Simply put we need to be careful of whiffing FW elevators and using slug moves at higher percents, since a good Luigi will not slack on the use of his amazing aerly KO moves like Fsmash, and even Dragon Punch if he can get the chance. Also For the most part, Luigi's attacks are faster than ours, and thus, safer than ours in neutral or well spaced on a shield.
Key Moves :
DAir : Luigi's recovery is quite linear, so pinpointing him won't be as hard as other characters. In some cases, you can even gimp him with a sourspot. Also, trading with his sourspot up B is like being hit with a kick sourspot...LOL.
Farore's Wind (Elevator) : As I always say, it's key for every MU. It is our earliest KO option, and is great for OoS punishes (It's only frame 7!) as always be careful though, keep as quick as you can to note if Luigi DIs away and react accordingly by grounding it as to not be hit by one of his deadly moves for whiffing.
Rangy Moves : Ftilt, Jab, and Fsmash are all great at outranging Luigi, even if Fsmash doesn't connect all the time (Or at all LOL)
Stages : I can't comment on this atm, I'm not sure whether or not we can use platforms better.
Score : I'm not sure exactly... Perhaps I'll give a more definite score later. If it were really slightly better than it was in Brawl, it would range roughly between 50:50 and 55:45 (Our favor) I think it is on of those, I'm just not sure if she actually could have a slight advantage over someone. It's a hard thing for a Zelda to accept...LOL.