ZONING
On the ground: Decent ground game, doesn't have great range on his main killing moves(D-Smash, F-Smash, N-air).F-tilt is good for spacing, up-tilt is GREAT for racking up damage, d-tilt is situationaly useful for stuff like jab->d-tilt trip->firepunch.His jab is overall one of his best moves for jab or jabx2->grab/d-smash/firepunch.His down-b is probobaly his best ground approach though it is stopped easily by any move with decent range or a projectile other than D3's waddles but it still closes distance between you and your opponent. Rating:Average
In the air : His air game is great, don't get me wrong but he is outclassed by several characters(MK, D3, G&W, Marth).So lets start this off, his f-air doesn't have too great of range but is usually connected easily after d-throws and when one connects you can usually chain it to any aerial other than b-air at lower percents.His d-air is a pretty awesome for kills and for finishing combos off or even starting them with d-air->nair and it does other stuff like stopping space animals phantasms.U-air is really nothing special all it does is hit people above you as it was intended.B-air is a cool move, WoP, good range, alright damage.Last but not least, n-air.N-air is my favorite move of his for several reasons; really good priority, good combo finisher and starter, his best aerial killing move, and of course breaking out of combos by using n-air.His aerial firepunch is nothing to scream about, it is not even 3/4s as strong as the grounded one.His fireball in the air is pretty cool for stopping short hopped approaches and is one of the reasons some Luigis are even beating Mks.All of his aerials and fireball can be airdodged after them in a shorthop so buffering is a must for luigi. Rating:Above Average
Off-stage: Edgeguarding is a breeze for Luigi if you always have a double jump saved so you can make it back with down-b otherwise not so much unless you are close to the edge.B-air WoPs are cool for edgeguarding same with f-air.If you knock space animals off they are pretty much dead just intercept their firefox and whatever wolf does with d-air/b-air.Don't use n-air to edgegaurd as it knocks them upwards but that is common knowledge.Fireball can be used to stop recoveries.Getting back to the stage with Luigi is pretty easy as long as you mix it up and don't overdo the down-b recovery to the point where you are way above the stage and trying to get back to the ground.His Up-b is easily edge-hogged so watch out for that.Missile can get you spiked easily so only charge it as much as you, don't over due it or you could end up on stage waiting for the lag as you oppenent charges a smash attack.Use your f-air when you get knocked off stage as it's the fastest way to gain your control back. Rating:Above Average
SPACING
Extreme long distance: Luigi is at a real disadvantage here.His projectile is pretty mediocre and doesn't even go half of Final Destination.Luigis only choice is to approach his opponent.The only way to do this efficently is to mix it up with SHADs, crawls, down-b, and fireballs as your closing in and to stop other projectiles if nescessary.Overall it can get annoying. Rating:Unbearable
Long distance: This is a bit easier than extreme long distance as it is more pressuring to your opponent as at this distance they have to keep on their toes.At this point you can start using your fireballs more for pressure instead of damage.Start short hopping aerials and try to force shield so you can go up and get grabs and combos in. Rating:Bearable
Medium distance: At medium distance you can start using your aerials to almost full potential as all of them are options at this distance.Use fireballs for damage and combos here such as fireball->grab/D-smash.Watch out for D3 and snake here, their tilts dominate this area. Rating:Bearable
Short distance: This is were the magic happens.When you are in this area it's time to relax and let your hands flow freely as you 0-60% combo people.This is were your smash moves come into effectiveness.Your tilted upwards f-smash kills pretty early and your d-smash is nice for knocking people off the edge.Up-smash shouln't be used all that much as you usually will have better options.Air combos are Luigis greatest asset, use them.Jab combos are his best options while not in the air.Don't use fireball at this distance. Rating:Comfortable
KILLING
Killing power: Luigi is pretty good at killing, the main kill moves being D-Smash, F-smash, and n-air.So he has a nice mix of moves to kill with and firepunch kills D3 at 71%.Jesus he is a beast, but firepunch is really for low percent kills and I wouldn't rely on it. Rating:Above Average
Gimping potential: He is good at gimping with his f-air chains and b-air WoPs but those are all he can really do to gimp.Well he has fire ball but that is only useful if you hit them at the start of their double jump as it just stops it.What really limits him though is his amount of jumps which unfortunately, has no way of being worked around. Rating:Average
Luigi: 26
So there is my opinion on this whole thing, disagree with it if you want.