oooohhh...this matchup is just a really ridiculous matchup for sheik once oli knows what he is doing(even though very few olis will have any experience)
folr the most part idk much about this matchup, ive only fought 2 or 3 competent sheiks, one recently,
for the most part you cannot camp oli, period, you just can't, don't try you won't win so you will have to play aggressive at point blank range,
your main advantage in this matchup is your ability to beat us a point blank with your high priority attacks, my advice for doing that is your needles,
they are vital in this matchup to create openings because we either have to somehow avoid/block needles gives you an opening to approach or take the hit giving you an opening anyway, using that opening you will need to somehow get next to us, either by dashing, shorthop, w/e,
at that range your gonna want to grab/ftilt at low percents and try to chain us off stage and predict how we will get on as to counter us and keep us off, at high percents from there your best option is a mix of jabs, grabs, and dsmashes(and only dsmash) with the same goal in mind, jabbing should only be used for when we are close to edge because no matter how we di we will be in a bad spot,
your best options for edge guarding are aerial needles or nairing us below stage then grabbing edge, we can't super armor 3+ needles and if you nair while falling then nair while jumping super armor gives you time to get on edge and edge hog us or we get hit and lose the stock
now, if you approach without needles i can only wish you luck that the oli has no experience, you want to pay a full mixup game and lure out our attacks so you can take advantage of our minimal lag time with your speed,
at close range our tilts are fast so if you don't attack fast enough a smart oli with tilt you and push you back putting you in position you were in before, so don't use attacks with startup lag if possible
now, what experienced olis will do: pivot grab and camp at mid range, use tilts/jab at point blank, use upsmash/up-b/ pivot to counter air approaches, out space you with a wall of fsmashes, di out of ftilt lock(don't try to chain to upsmash as its to easy for oli to avoid) not sheild grab or spotdodge, super armor when aerials, edge hog you
what un experieneced olis will do: shield grab , use smashes always and never tilts, shorthop nair your air approaches(your nair/fair/bair will trade hits with our nair but give more vertical knockback) spotdoge, roll a lot, pivot grab only ground approaches, use dsmash/ upsmash alot, try to nair->ground canceled smash you, fight you in the air, throw multiple pikmin when short hopping
notes: oli can grab combo your for an easy 60% if played right at low %s, you can and can't beat our fsmash at certain times depending on pikmin, you upsmash+dsmash can get rid of all pikmin, you have to play offensive offstage, ftilt->upsmash rarely if ever works
synopsis: oli can camp sheik with our grabs, pikmin, and fsmashes but sheik's needles will be key factor in giving her openings, she will have to play point blank pressure and most times chase oli in the air where she beats him, olimar has enough lag for sheik to come in and attack if oli screws up almost any attack, dash attack will be a great hit and run move for sheik,
ill say either 60-4- or 65-35 olimars advantage, depending on matchup experience