let me start out by saying...olimar beats rob...buts it not THAT bad...not at all...like 55/45 (barely in his favor).
pre-game...ban bf...you can't afford to lose that neutral. if its striking, strike BF and uh whatever stage you dont like...i dont like yoshis for example...but yeah. if its striking, ban halberd, olis usually like that stage...not always but its a bad stage so ban it just to be safe. frigate is good obv cuz of the lack of ledge but its still pretty small...I prefer siege...you dont get as many gimps cuz of that 2nd part but I just like it...the only part thats arguably bad for rob is the first part but the platform setup there is REALLY nice for ROB...most robs dont go to siege as much as they should...anyway
mainly...you want to grab olimar as much as possible..and some of you will be like "olimar's grab beats ours, why do you want me to spam grab stingers, you're an idiot", but it doesn't really work that way...basically what you want to do in this matchup is force olimar off the stage right? because then we can **** and get low % kills. well, if you can get ONE fthrow, like anywhere on the stage, Olimar is in like the worst position he can possibly be in. one low % fthrow, what options does olimar have? yeaaah...they suck. if he double jumps...uh oh...**** man thats never a good idea, oli knows not to dj, they want to be back on the ground asap. so you want to watch him fall...and then...wait for it...
YOU GRAB THEM AGAIN OH ****! and I know you're like..."stingers wtf, rob cant chaingrab olimar stop being stupid, you're just gonna get faired or something **** man you're lying i don't believe it." but I'm being forreal. olimars options in that position are like...ganondorf level terrible. he doesn't want to be there. if you know a grab will pay off so much, why not go for it right? things to watch out for there are low platforms and ****...but yeah...
grab ***** oli!
now when you're not grabbing him (which is most of the time obv) you're trying to keep it as close as possible or as far away as possible...now if you're far away charge up a gyro or something, don't even bother lasering him cuz you wont hit unless they try to jump and side b you or something...but then if you see an oli do that you know they're stupid and you can just have your way with them right? cuz it won't reach at the distance I'm talking about...anyways...charge your gyro or something or just get it out on the stage (obv gyro is good against oli right? (yeaaaaah.) gyro is your best tool at mid range so use it wisely. dont just shoot a gyro randomly and let him shield it to destroy all that effort you put into charging it...just get it on the stage or hit him in the air or when you know it'll hit. if he sees that you're too far away to get camped...then he'll move forward obviously, thats what he has to do...when you see him start to come towards you a bit, you ****ing charge his ***. thats when you can lay the hurt on...up close olimar loses to us, but obviously its hard to get in right? sh air dodge is actually useful here...airdodging through olimar in this matchup is ****, straight ****, dont abuse it because obv it can be punished but the olimar won't normally be thinking along the lines of "better watch out for his short hop air dodge" so they wont normally process it fast enough to punish it. if you can get BEHIND the olimar but close, you're in a good spot. try and get a grab in, or maybe turn around and fair him or ftilt or something, but keep the pressure on once you get in a good position like that. obv keeping pressure on olimar isn't as hard as lots of other characters so try and rack up lots of damage in that time where you have him on his toes. but because olimar is such a gay character he'll get away eventually...yeah
so repeat. laser is really only good at mid/high %s when you're in this position and you can follow up your hits with something.
utilt ***** to get pikmin off you...random fact.
lots of robs play this matchup wrong (because its not an easy matchup, so its understandable) and try to outcamp or approach with sh fair and stuff...man that just doesnt work...you'll get *****. seriously...don't sh fair...just dont...its hard, i do it on reaction sometimes but just get out of that mindset. olimar ***** standard rob...so play outside the box...rob has lots of tools at his disposal guys.
the reason I think this is a bad matchup is because its hard being outside of mid range against oli...but rob has the tools to do it...you just gotta know oli's **** and read him well. if oli gets his grab on you (and he will) then remember this:
he wont chase you in the air out of a grab. i mean if its a low% grab and he can link it to a usmash then he'll chase you cuz you're in a terrible spot...but I mean just straight out of a 40%+ grab, olimar wont chase you in the air, he'll try to **** you when you land. so use that to your advantage...you dont have to land right away. seriously. i promise.
hope that helped