I'll list some that I have come across
Some sounds are missing/slower to start playing (most notably when Xigbar does his DM, might be related to the voiceless attacks) (Final Xemnas' music also takes a bit of a time to start after you died in the fight)
Final Xemnas' Reversal RC sometimes doesn't appear
When you get back from Zexion's book world, the effect isn't in widescreen, it's still in 4:3 (not necesarily a bug, but still)
Camera sometimes doesn't lock on to the specific angles intended (e.g. when you die, when Xigbar tries to go into "snipe mode" and when Final Xemnas grabs you)
I've had the saves for a while now, however, I also downloaded them from the internet long ago (I don't remember where I found them) and modified them for my personal use.
You're free to use them however you like
Make sure your pnach file is named correctly, e.g. F266B00B.pnach (this is for Kingdom Hearts 2 Final Mix, if you're using a different game,
launch the game, and check your console for "Game CRC = 0x<letters and numbers here>"
The <letters and numbers here> part is what you need to name the file as. (note that this might be dependent on what BIOS you use.))
Now, onto what you put in the actual file:
Here's a random sample code:
This should become this:
// indicates that it is a comment and seperate from codes, so it won't try to load it
x = 0 (Disabled) or 1 (Enabled)
Here's a few examples of how codes should look like:
//Play as Roxas
//Infinite Jump (glitchy when using Drive Forms) credit to Skiller for porting
Oh, and master codes are almost never needed.
Hope this helps.
Camera mod(one is enough):
0 - Third person
1 - First person (the one with select)
2 - Locked-on enemy (the one with R1)
3 - ???
4 - Camera stays in one place, doesn't move
5 - 100 Acre Wood Top-down camera
6 - Parents onto some entity (?)
7 - Does some weird camera movement on some entity (?)
8 - Light Cycle camera
9 - Chicken Little FPS Mode (doesn't work)
A - I don't even know..
B and above - Camera stays in one place, doesn't move