It's helpful to post ratios though.
Pros:
*Inhale ability
*Our throw combos, for some reason, work perefectly aganist Sheik (ESPICIALLY forward throw), which makes it easy to combo her back. And all combos are effective too, MAYBE, NOT SURE ON THIS NEXT FEW WORDS, espicially since it isn't that easy for Sheik to get out of combos.
*Our light weight makes it hard for Sheik to use muitiple forward airs at us at mid-high percents (At high percents it KOs)
*Forward Smash is extra good due to both the way Sheik's attacks work, and her fast falling speed.
Cons:
*Sheik's bounching fish can gimp you, but it's barely a problem.
*Sheik's huge amount of speed, and fast attacks, are a HUGE problem, and is why this matchup isn't in our favor.
*It's not that easy to down-air spike Sheik due to her speed and the way her recovery works.
Inhale:
Defitenly do it. Needle is one of Sheik's best moves, so it helps to use it back.
Customs:
Neutral Special:Jumping Inhale. Jumping Inhale makes it WAY easier to inhale her, and we need the inhale
Side Special:Un-Chargeable Hammer. Startup is EXTREMELY important in this matchup, due to Sheik's low start- wait, what Start-up?
Up Special:Always wave Cutter.(Up-Special-3), comboing is great for Sheik, a great finisher is very effective. and it makes it possible (but hard) to punish Sheik.
Down Special:Down Special is useless, do anything. Default even works due to high knockback.
Stage Picks:
Always do battle field. Sheik is worst at Battlefield than other stages. Lylat Cruise can be useful too, to annoy her recovery.
Additional Notes:
Sheik can easily punish us for whiffs, so be careful when you attack.
Also This:
https://www.youtube.com/watch?v=oItSpkKI4_E (Kirby won the first round, second and third rounds were time-outs, MikeKirby may have won both of the timer was longer) and
https://www.youtube.com/watch?v=Ck87fsfxkYI
Matchup Ratio:50:50