ROM Hacking Polys Guide

credit: SK Stylez

Right, welcome to ROM Hacking Polys school.

I'll be using Nemu and HxDen for this guide.

You'll also need these base addresses for the Poly Points as well.

800A55C8 - Right Crotch
800A55FC - Chest
800A5630 - Stomach
800A5664 - Entrance?
800A5698 - Head
800A56CC - Lower Left Leg
800A5700 - Upper Left Leg
800A5734 - Left Foot
800A5768 - Left Hand
800A579C - Left Fingers
800A57D0 - Lower Left Arm
800A5804 - Upper Left Arm
800A5838 - Lower Right Leg
800A586C - Upper Right Leg
800A58A0 - Right Foot
800A58D4 - Lower Right Arms
800A5908 - Right Hand
800A593C - Right Fingers
800A5970 - Right Upper Arm
800A59A4 - Face
800A59D8 - Hat
800A5A0C - Left Crotch
800A5A40 - Lower Back
800A5A74 - Upper Back

1. In Smackdown Mall, create or edit a wrestler with the shape you want to poly hack. Once you've decided on what you want to hack, enter the base address of the poly and then select the first set of values and copy that into the address bar.


Now you'll see your poly points. Now we're going to find the poly in the ROM. The part that is highlighted is the bit that is same in game and in the ROM. You wont be able to find the values such as FFEC etc, as that is broken down further. So, copy the part that is highlighted.


Once you've copied the value, do a hex value search in your hex editor. You may find that with some polys you'll have a lot of matches. It's just a matter of trial and error before you find the right one.



Highlighted below is are the poly points in the ROM.


Confused with the above? Here's a breakdown below.

The first 3 highlighted values are the base for each point.

00 FE 00
00 in the ROM is 0000 in game
FE in the ROM is FFE0 in game

The next set of values are your offsets of your points
03 0C FB
03 in the ROM is 0003 in game
0C in the ROM is 000C in game
FB in the ROM is FFFB in game

Now we combine the base and offsets.
0003 FFEC FFFB

These values should now look familiar.

Now to change some values. We'll subtract 0x10 from FFEC in game. FFEC now becomes FFDC
In the ROM we have to do the same with 0C. 0C now becomes FC.


Continue with all your changes, and once you're happy with it, save your ROM.



Load up your edited ROM and see your changes.

As I said before it's a matter of trial and error. A little tip if your hacking lower body attires, the crotch polygons and upper leg polygons are all located very close to each other.