Palettes and Hex Editoring

I've read the different threads and am still confused.

I know the characters share palettes, but what I want to know is there a way to set the battle palettes for one of the PC's to one of the NPC pallets that are not used like the one used for the door?

Is hex editing the only way to do this because that blows my mind.

Also on a similar note, does the GBA version's palettes work the same way? I'm assuming they do.

ASM is the only way to do this. There are only a handful of battle palettes, but with ASM you can point the script at the beginning of battle that loads the palettes to the same place the overworld palettes are (which keeps every existing PC palette working except esper terra, which you can reset), and then change the battle palette pointer table to reflect the palette you want them to use. It's not a particularly complicated ASM task, in fact, its a great beginners task and a good way to break open the concept of learning ASM. If you are interested, go over some hex tutorials in the tutorial section of the forum then come back here and I will give you the locations to find the code that needs to be altered.

I read some. How do you know if your rom is headered or not?

I need 9 battle palettes.

These were the ones I was looking at changing to battle palettes:

Index = 137 Palette Index = 13 Description = Some cloud looking thing
Index = 144 Palette Index = 19 Description = Looks like a rock
Index = 82 Palette Index = 17 Description = Chest
Palette Index = 30 Description = Doesn't look like it is used for anything
Palette Index = 31 Description = Same as 30
Palette Index = 27 Description = Same as 30

Those are just some off hand. BTW I got those numbers from FF3usME.

Do you know the best one's to use that will least affect the game graphically?
Thanks, for responding.