I don't know if this question can be answer here, but I'll say it.
If you Luigi mains have any good experience against Samus, not Zero suit Samus, please let me know. I faced a good really Samus player and I do not know what to do to get in on her. I tried my best to approach her, but I keep getting wall out by her aerials, z-air, missiles, and charge shots which made it hard for me to be alittle more aggressive against her. Her recovery options are not easy to gimp and I can't do the button mash tornado, so that's out of the question. Her down-b can be tricky to predict the landing. I know that she's floaty, but I don't see her being easy to jiggle because of it. That all I have because those are the parts that I struggle in the MU so if you have any good experience and useful, please let me know and I'll do my best to improve.
Luigi is just generally pretty easy to zone out and camp. There's a Samus in my local area that's pretty good with Samus, I haven't had a chance to play him too often so a lot of the stuff he does might be flowcharted and potentially surpassable, but I still feel pretty discouraged to play against a solid Samus with Luigi. I started putting some work into G&W and Mario recently and even if I can't do as well with them as I do with Luigi I'm much more likely to fare better.
Honestly the best way I've managed to deal with Samus when playing online is to throw her offstage with fthrow or backthrow and try to force her to recover low, then try to get a cyclone gimp after they double jump. This probably won't work against somebody who knows what they're doing though.
Well i have no idea about luigi, prepare to look at me like im a ******.
I find luigi hard to control, any tips on getting use to him?
I know all of his combos come out of his down-throw, what are the moves that combo out of it?
what are his main kill moves and kill setups?
does he play similar to any character? Like his brother, mayro?
*cough cough* mario i mean
Spotdodging or shielding to stop Luigi from sliding when dashing around is very important to avoid getting punished for committing to a dash. You can also jump out of dash and do a retreating fair, or turn around before jumping to backair.
His throw combos now depend on enemy fall speeds/weight but your best bet to always hit any character is to upsmash after downthrow, then downthrow to fair into fair/nair/dair after they've got around 20%+ on them.
Luigi's best kill setup is jab1 -> jab2 -> upB, but if people react in time or expect it they're able to shield, and you'll be eating a hard punish for missing the upB. Fireball locks after a missed tech are probably the best setup for upB, but the timing for fireball locks is very strict and hard to pull off on the fly unless you're setting up for them with forward throw. Soft nair (late hit) and Upair can also lead into cyclone at certain percents (very specific %s and only on certain characters for nair) and kill, but it's pretty hard to convert unless you're really good at mashing.
Your best bets to kill outside of setups are usually upsmash and back air, both of which will kill at around 120% for most characters. Downsmash is also really good if you can manage to get the back hit, and fsmash has amazing kill power but is generally harder to land. If the stocks drag out horribly and your opponent reaches 150+% a sweetspot neutral air can kill even from stage ground level.
Luigi usually plays rushdown to overwhelm opponents with very high damage and good frame data. The main difference with Mario is that he has almost no way to deal with good projectiles, which means you can't play rushdown against every character since some have tools that can easily shut down your approaches if you're reckless. After a while playing Luigi you'll eventually find out what characters you should go in for and which you should play against a lot more patiently looking for very specific openings or baiting them into creating one for you.