Edit: I'm 100% certain that the Knock Off goes from offset 1D4A0F and finishes at 1D4A9E, because there is a pointer to a new move at 1D4A9F. However even with all this copied and combined with Aqua Tail, the end of the move freezes. In the mean time I've used Slam and it works.
dude, here is my Aqua tail code:
I created it few days ago, i'm not remember what is exactly i'm doing to fix the freezes though