First tournament, first game was against richbrown
Go figure
Basically rush down DDD works best in this MU.
What is a rush down DDD?
Rush down DDD means absolutely no turtling or standing still. Always in the opponents face and never giving him any room to breathe. Unless you have a plan with Waddle D toss dont bother using it too much.
There is really no point trying to be full screen or at the other end of a stage camping against Olimar. He out camps DDD very well.
Tricks that help you get in;
*Dash, then Spotdodge next to him
Don't over use this good olimars will punish it with either utilt,nair,a smash or a grab. Its a really good way of getting in on the ground.
*Inhale
Gets olimar off the ground. If you mis space it olimar can very safely grab punish you out of it. I prefer using pivot inhales out of SH or FH while im air camping. But only as a mix up and seldomly do i use it. When i do use i make sure im always in range so he gets sucked in.
*Your aerials, utilt and Bthrow are your friends
Air camp olimar as best you can. With that being said do not go to final d or places like it. Go counter pick him to rainbow or Brinstar where he is forced into more aerial battles. Don't forget places like delfino where if you pressure him into the water hes in serious trouble if he has no blue pikmin. He might be a power house but with proper pressure on certain maps DDD can shut him down. He loses against our aerial moveset and inhale. If you see him whistling trying to use Super Armor to come back to the ground, keep hitting him, inhale or predict where he'll land and grab him. Just always make sure your never under neath him as uair and nair/utilt/usmash are some of his best get off me tools. Bthrow is best for damage, and sets up for walls of pain.
One of the problems of this MU is that DDD has no quick way of getting pikmin off him without exposing himself. Utilt is really DDDs best tool and it requires 2 things, being on the ground[olimar likes being grounded] and staling your best KO move, a KO move you most likely wont be using on olimar since hes always on the floor. Use it to get pikmin off you if you get over loaded with them. As for what color to pay most attention to? Whites, dont bother swatting off anything else besides whites. Whites do alot more damage when attached.
Heres a couple more tips on how to deal with pikmin.
Shielding/Air or Spot dodging - Pikmin that arent purple go past DDD and ignore his hitbox if your shielding. Purples cause DDD to have shield stun. So if you got purples coming at you dont forget to pshield them. Always make sure to avoid whites. Proper shielding is really the best way to avoid any grounded damage that isnt grabs.
*Use ftilt as a punisher
Good olimars will pshield and grab ftilts not used right.
*Dtilt
In some rare cases if you got a situation where olimar is trying to roll behind you, dtilt. Or if for some weird reason they get inside dtilt them out. Or jump back and aerial.
When Olimar is in the air or off the ground. Make sure he stays there. Don't be afraid to use Uthrow if necessary to keep him in the air. When hes off stage, make sure he stays off stage and never let him come back. Watch out for the pikmin chain, his upb. It'll stage spike if your not careful. He can also use this on stage to get you out of the air or through platforms.
Also Pikmin have very strange properties, they have hitboxes and their own health. There are times when they run back to olimar when you can hit them and kill them even during certain animations where a pikmin runs in front of olimar. If they latch onto DDDs nose you can swat them off with fair. Ftilt goes through olimars fsmash[cept purples i think]. So get a friend and experiment with how pikmin work. Keep in mind the more olimar has to pluck them, the better your chances he'll get punished and killed for doing so. Hes abit of a gimmicky character and all olimars will have one consistant habit, plucking, grabbing and whistle. Just make sure your punishing these habits as all olimars will use these moves at some point.