His dash attack is awesooooooome!
@TANK:
Luigi's dash attack can be useful for stopping enemies at ledges, such as recovering enemies or enemies jumping up from the rapetent area of Hyrule. Weak, but multiple fast hits, sending your opponent away. It won't kill or combo but it's a good long poke.
His u-tilt and even his head bonk are powerful and very useful but are death traps too if you miss time it or as DMoogle mentioned, hit them with low %. He requires patience
Indeed, this is a good thing note as well.
Luigi's approach game is crap because of his slow aerial speed, and he has trouble comboing from zero percent. What you need to do often is build a little damage on your opponent with safer move choices before attempting to combo to death. The great thing is that most characters are guaranteed to die if hit with Luigi's uair at mid to high percentages, since it almost always leads to more uairs and and an up+b or down+b.
Don't spam down+b all the time if you're being combo'd - good players will read that you're going to do this, will bait it out, then punish hard. Knowing when to use it will come with that split-second judgment only experience can bring. Nair also breaks combos and up+B can absolutely **** someone who combos you wrong. For one example, if you just bounced off a wall (giving you brief invincibility frames and lowering stuntime), often you can wait for them to get close to you again then just up+b them. You see this often in Luigi dittos actually, Luigi#1 will be comboing Luigi#2 with uairs, when suddenly Luigi#2 will up+b kill Luigi #1. (There is no justice!) Using up+b out of shield is quite powerful too...
...which brings me to my next point. Luigi's traction is the lowest in the game, and as such shield pressuring him is nearly impossible unless he's caught in a corner since he slides away so much. Keep this in mind because when on a platform, you can very often play this to your advantage - opponent hits your shield, you slide off the platform, you retaliate and punish. Like anything don't abuse this, or it will get predictable.
Luigi's edgeguarding is pretty good too because his vertical recovery is incredible. Be creative. Stuff like 2 x dair, when spaced properly on a recovering Link's head or something, can take a stock from very low percents.
A few extra tidbits that can help you out:
- Dair -> uair -> up+b can break shields most of the time.
- If your opponent has a returning projectile (IE bouncing fireball or boomerang) or you're in a teams match, Luigi's bthrow will hit the projectiles and other opponents on either side of you with the opponent you're bthrowing.
- Don't use down+b close to the ledge for recovery, use it away from the ledge and BEFORE your second jump. Sometimes you won't have a choice, but when you do, don't leave yourself vulnerable with it.
- Luigi's roll is very fast compared to most characters. Dodging stuff with his roll and countering with fast stuff like a grab or usmash is something you will even see top players do.
- Luigi can duck VERY low, useful for dodging! As
one example, if Falcon tries to bair Luigi on level ground, he will not be able to hit a ducking Luigi. Counter quickly though!
- Luigi's jab can be canceled into a grab, just like Mario. Hit A then R quickly in succession and it'll work. Some characters will have too much "initial stun" from the jab to be grabbed, but it works great on shields.
- If you're too low to make it with Weegee's up+b and you're out of jumps, up+b and point the joystick in the opposite direction you want to go but immediately release the joystick. You'll do his extended/vertical up+b which gives you a lot more vertical range. Practice this on Hyrule by going under the first platform, if done right, you'll make it all the way to the second one from a grounded up+b.
- Weegee's up+b has terrible knockback if you don't sweetspot it on your opponent, so you should almost always go for the ledge when recovering with it. If you're going to be ledgehogged, that's a different story. If you can edgecancel it reliably, mix it up by aiming for platforms every once in a while.
Hope this helps, TANK! Also if you have AIM or MSN and want to play, I don't think we've played before. We should.
Just as a note, I'm building a doc called "Smash64: Master Theory" and it has more stuff like this - basically a guide of every little subtlety and AT that's in use in competitive play that's written nowhere else. I haven't worked on it in a while but when Weegee's section is done I'll send it to you 
