My buddy FluffyNeko and I actually discovered a fairly neat trick last week that we dubbed "shield dashing" or maybe shield cancelled trotting (sc trotting for short). I suppose that's more what it is. Anyways, I'll explain below.
Ike is on the left side of the Stage.
Jam right and then immediately after, hold the shield button so that it pops up at the earliest frame it can. (which happens to be about one character space for ike.) As soon as the shield pops up, ike continues to slide forward a little bit. Now here's the kicker, that shield that you just put up completely cancels the normal "stopping" animation that goes with that last little slide. Allowing you to immediately neutral, grab, spot dodge, whatever you want. It is very close to what wavedashing was in melee, allowing me to change directions really quickly. It's faster than straight running and about 10 times more useful.
To give you an idea of just how much projectile spam you can stop with this, I can close in on an arrow spamming pit without taking a single hit or leaving the ground. And it does happen relatively fast as well. It's at least doubled the speed of my ike play. I'll try to get a video up for examples but it's just a basic mechanic of shield cancelling that we already knew about, just applied a rediculous amount to ike's movement since his trot animation is so short and it's abusive for him to use.
This works with all the characters well. however some are much more effective than others. To exemplify; It does not apply as well to falcon but still works. He just covers a much larger distance before the shield comes up so it's a bit more predictable and less sporatic like Ike's is. Try it out, I'm sure once you get the timings down you can start to move really quickly while keeping yourself safe as well. Trully a crazy ike technique that has helped IMMENSELY with projectile spam.
Just another reason that Ike is a beast. <3