I can't beat Olimar if I can't outcamp him. So I'd be bad to give advice on this matchup. <_<
this is
100% regurgitation, I don't have any good IRL experience against olimar(and the matchup is just ******** online), but here are some things that I've heard
olimar's grab doesn't have armor like other grabs, you can ftilt it and outprioritize it/clank with it like it was a normal attack
olimar's tech roll is retardedly awful, if you can recognize his get up attack well you can basically kill him with one grab(good luck getting it lmao)
from what I've heard, olimar supposedly can't really camp snake, you can DACUS through his spam and approach while he's still in the air(and if he's not short hop tossing his pikmin you'll probably outcamp him). this...goes pretty contrary to my experience but maybe I'm doing it wrong
if you can knock him off the ledge lay a mine or drop a nade and hog, if he's in position to up B above you then he has to get hit by the explosion
all things considered I still think olimar is probably worse than DDD but like I said, I need more experience...