its not really because its metaknight, its because metaknight ***** olimar. much worse than he ***** most other characters
if olimar is ever in the air, mk can basically upair forever..and obv he gimps olimar anytime he's remotely on the side of the level
i dont understand the peach vs. olimar matchup. or the sheik vs olimar matchup. i play peach and sheik, but i can't comprehend how they beat olimar
inb4pops
The main crux that both Peach and Sheik share is that they've got quick, more-longer-lasting-than-usual attacks that don't have much landing lag, great shield advantage
with these attacks, and they're easier to use to eat through Oli's pikmin attacks. This makes it really easy for them to attack Olimar with an aerial AND jab before he can retaliate with anything out of shield- including shieldgrabbing, which ties with a shield dropped jab for his fastest option out of shield (11 frames and no grab armor as opposed to the regular 6 or 7 frame grab, correct me if I'm wrong). Peach has her 2 frame jab that interrupts everything Olimar does up close and sheik has her infinite jab that prevents any shieldgrabbing. (Most characters can either shieldgrab the first hit of her jab or just DI out of the jabs and use a quick dtilt or something. Olimar has neither option really.)
One may ask why the Oli player couldn't just shield both the aerial and the full jab combo, and
then shieldgrab. Technically he can. Some Oli players do that. I don't like it because of the various safe, mixup options these two have after the aerial. The opponent doesn't have to use their jab all the time. They've got other options. THIS is the MAJOR, MAJOR thing people MUST realize if want to beat Oli players with one of these characters. They've got to be good at mixing it up too. When they do that, it's a nightmare.
Ex. Let's look at some frame data. Oli's quickest option out of shield takes 11 frames to do. (11 for his grab, and for his jab out of shield it's 7 for shield drop+ 4 for jab=11 as well) That's ridiculous. Peach's fair, when autocanceled, has a shield advantage of -2. This means that she can fair and do one of many things before Olimar can do squat out of his shield: jab(2 frames), spotdodge(2 frames), roll forward(4), roll backward(5- Cheap correct if I'm wrong. I believe it's 5), dsmash(6), ftilt(6).
If she uses her nair (-7 shield advantage) she can do all of those above except roll backwards or use any tilts or smashes. This isn't even to mention jab canceling into a grab, which for Oli is pretty hard to defend against. She's also got a bair and upair has a frame advantage of -6, so they're even better than her nair against Oli's shield, and I think her dair is -7 or 8. One of the two, so it's not as good.
Ok, so they can use an aerial, land on his shield, and do something to Oli before he can retaliate. So what?
It's not just that. They also both have at least one long lasting aerial that goes through the pikmin. Peach has bair, nair, and fair, and Sheik has nair. This helps combat against Oli's pikmin attacks.
Ex. You're Sheik and you're trying to approach. You anticipate that if you short hop at Olimar, he may run and upsmash from underneath, space an fsmash, or just shield. A short hopped nair covers all of those options. Nair will eat through the pikmin in the upsmash (as will pretty much every other attack), you don't really have to time the nair to hit the pikmin because it's long lasting, your nair will eat through any other smash attack including fsmash, and Olimar can't shieldgrab nair because of her many mixups afterwards- including infinite jabbing.
This is just one of the many reasons I feel Sheik and Peach do well versus Olimar. They've both got some other things including great edgeguarding, reliable retreating options, and some good approaching options. Neither has a huge advantage, but it's moreso than most. Most people I play against that use one of these characters don't know how to use what they've got against Oli. These are advantages that are pretty unique and specific against Oli, so I'm not so surprised.
edit: umm... that looks confusing.
tl;dr- nair->jabs > shieldgrabbing