It seems that cr.mk starts ducking under attacks from frame one since it can be used to duck under safejumps both on crossup and otherwise.
I haven’t had the chance to test this out much since I just figured that out, but someone else might already know about this and can fill us in a bit more.
It’s without a doubt a useful tool, though it’s hard to get the timing down on wakeup since it’s a 1f window of doing it if they timed their safejump correctly.
Actually, 2f window if you input it mk~+lk, but it’s still pretty tight.
If they time their safejump wrong the cr.mk will punish their jump in instead, which I thought was pretty neat since that gives you some extra reward for doing it.
At the very least it should make Chun less vunerable against jumpins on wakeup than she is now if used correctly, and she definitley needs it.