Well the info I got is:
-Sheik recovery is better than Ike's and she's good at gimping it.
-Countering needles is okay but it seems to help her approach you.
-Remember to use spacing or else you might get f-tilted over and over again. (did this against a friend, he got pissed)
-Try to edgeguard when she uses the chain to recover. I think it might make her go into the immobile state and fall to her death.
-Since she's faster, you QD to move around faster altough don'r use it all the time.
I say just try to use your power and range to beat Sheik and remeber spacing.
^_^ I enjoyed how you are giving me Ike advise while my signature, avatar, and main icon are all Sheik.
Anyways, yes Sheik recovery as far as distance covered is much better then Ikes and she can gimp Ike fairly easily when Ike isn't in range to use his ^B. However once Ike get's close to the stage Sheik loses most of gimping ability's and is force to attack near the end of the move instead of try to hit Ike before activation. Not saying she can't do it it's just very risky.
Although countering needles does work in Brawl it will be simpler to just shield them unless Ike is alright airborne then maybe at fairly far distances this will be a good option. I really don't know though, out of all the Ike's I've played none of them ever tried to counter Sheik needles.
Ike game is too repetitive to effectively space for long. Fair and the last part of Ike AAA combo can be side stepped thus removing most of his good spacing game. Ike may have other moves that do a good job for spacing but those two are the one's I notice the most with Sheik.
You sir are wrong. If you do hit sheik out of her chain recovery odds are she will die if Ike is the one who hit her so I can see why you might think that. Keep in mind that Sheik don't gets her jump back unless she pull herself to the edge so not only have you just sent one of the ligher cast members far away from the stage but with no jump, not to mention Sheik is the 2nd fastest faller in the game so that doesn't help her recovery much as well.
Using the QD is a bad idea against Sheik as she will punish you with needles if try to use it on the ground the same could be said about using it in the air. The only time it's safe to use the QD is to cut the distance between you and Sheik if Sheik is currently off stage, has preform and miss with a laggy move such as the usmash or vanish(Sheik finishers), or if it can be combo into. It should not be used to approach.
This match up doesn't look very good for Ike...Which is why I'm waiting to see how the Ike forum is going to counter a defensive Sheik. I shouldn't be able to kick such a cool character *** with so minimal effort.