I have this replay, a self spar, where Uke does some crazy shit. And I want to take that shit, and move it to a new replay, because Tori doesn't look so good. How can I exactly replicate Uke's movements?

Run it trough http://toribash.enikesha.net/ and then replicate it with given info.

..It'll recuire lots of work, but...

Hey I do remember this replay phaser!
I was looking for that. Thanks dargon. I guess this will give me ideas for wushu moves..

There are some 3rd party apps that can help you.
But some of this is not actually working for me or download link is gone.
http://forum.toribash.com/showthread.php?t=31306
http://forum.toribash.com/showthread.php?t=88908

I also knew one but I cant remember where it is and what is the link.
It a website too like what dargon posted.

Can I C/P Uke's movements from one replay to another?

yes, you can. Just put the movements in the right frames and it will alright. But movements may look hacked/choppy.

It is a lot of work. Open the replay with notepad and you need to copy every movement line which has "1;" with it. E.g:

JOINT 1; 0 3 1 3 2 3 3 1 4 3 5 3 6 3 7 3 8 3 9 3 10 3 11 3 12 3 13 3 14 1 15 1 16 3 17 3 18 3 19 3

Joint 1; is uke's line while Joint 0; is your tori's line. Same goes for every other line like Pos, angel, linvel etc.

I suggest enikesha's replay parser because notepad editing is difficult.

yea but this will look bad if ur tori every touchs uke because uke will still be at predestined path at the next designated point.

So if uke runs forwards 1 metre.
C/p
uke is halfway, you push him back, he will still run 1 metre, but will teleport and stuff

Im sure its possible but what u need is a program which copies only the joint movments and then makes the postition points up as it goes. (example uke challenge)

Use the ToriParser

It will track both tori and uke's move, even to the detailed bit