MK's IDC goes FASTER than his running speed BUT, once he starts moving he can't stop so if a MK is stationary then it won't be that hard to evade his down-B (used to retreat). In fact, if he's stationary when he comes out, that basically gives you a free hit. Once he starts moving, though, he can't stop moving so the MK is forced to try and control it by tilting the control stick down and diagonal back and forth to make sure he doesn't run off the ledge with it and die.
Huh? You HAVE to keep on moving? Not when I tried it. You can move toward the ledge, stay still there for a while, then move to the other ledge. Do whatever. Unless I've gone mad, I think you're mistaken.
Knowing this, retreating to the ledge actually WOULD be a good idea because when MK reappears he's either close to the ledge enough to punish him or he's farther away giving a safe recovery.
So he either forces you into a bad situation (honestly, being near the ledge against MetaKnight isn't smart), or he's using it as a runaway move.
What I can assume from this is: You either let MK have you in a positional advantage, or let him turn the situation into a neutral situation. Doesn't that mean he can easily get you into a disadvantageous situation on-demand, as well as reset any control you have in the match by doing this assuming he has the time (which considering playing aggro against MK isn't smart to begin with, should be somewhat easy for him)?
Also the screen moves as MK moves so it's easy to know when he's near and when he's afar. If he tries to do the down-B attack out of his down-B to try and punish the person on the ledge it will be obvious because the camera will be centered on both players so the person on the ledge can roll/jump/attack depending on the situation or if there's an opportunity to punish.
Yes, you know that he's close, and when he's far away. Yay?
I thought the camera is centered anyway so as long as both players are in relative proximity to each other. Whether or not he does the attack should be irrelevant, no?
Also, you don't know WHEN he will attack. I don't have the Sharingan or whatever, I don't know when you WILL attack. If I roll, he can time it to attack me out of my invincibility frames, if I jump, he can attack me on the way down or end the cape with little lag and try to hit me with other conventional moves. As for attacking, that's only if I blocked/dodged his attack, which I
cannot foresee.
The best way to actually use the IDC is in short bursts to get around projectiles or to get behind enemies using moves with long durations (wario's bite, ICs blizzard, Kirby/dedede's suck) or to evade an oncoming attack at mid to long range (or another move that is equally obvious). Using it at close-range is actually a bad idea because in the start-up of the down-B you can get hit out of it so if they predict you will use down-B at close range they can punish you.
Of course, isn't that why most people won't be using it in that close-range fashion anyway?
The MK at this point could either reappear to try to stay as far away from stalling or he could stay in and try to re-approach again because he can't stop after he started moving.
Again, I believe you are misinformed. Try it (the move) again.
Since the screen moves with MK it's quite noticeable when he starts to approach you so then you roll away, jump->airdodge, jump on a platform, shield spam, or any combination of these.
Just because I can see him near me does not help that he can attack at any time, at his demand, not mine, and that any chances of me avoiding it are from my predictions being correct.
Also, the highest platform (top of Battlefield), can be attacked by this technique. Simply DI up and let the slash go and you can attack. Plus, being on top of Metaknight isn't smart either. To "avoid" the technique, you must put yourself in a bad position against MK? Surely sir, don't you see the madness of that notion?!
Jump and airdodge leaves you open at the ending frames, as you cannot chain airdodges together instantaneously. A smart MK will wait until the invincibility frames wear off or wait until you reach the ground.
As for shield spam, I thought we don't have infinite shields. He can just wait until we wear off our shield (with spam or just holding it) and then attack, either breaking our shield for a larger world of hurt, or to stab through it with the attack anyway. A smart MK won't just randomly do attacks until he sees an opening with this anyway.
The MK HAS to reappear within a reasonable amount of time or else he's stalling and the opponent can call a judge over.
That's subjective on what is "reasonable" and what is not.
Simply put: You can't time when to avoid this; the attack comes out instantaneously and the only lag is that of if it's blocked. Considering you can't block what you cannot foresee, that's an issue. Running away from it is nigh-impossible realistically speaking. You either put yourself in a disadvantageous position, or you have to play the guessing game of when to do "defensive tactic X."
EDIT: I'll see this in action today I suppose. It's not at FAST, but it's a non-srcub tournament, so it'll be there very likely.