Palletes, almoast all characters need them, I will post here which character needs palletes and which one doesnt:

Ryu (Full)
Ken (Full)
Ryo (Full)
Jill (Full)
Iori (Full)
Kyo (6 left)

Master Bison (8 Left)

Dan 4 left

Just save the images and edit their values, I will choose the best till character is full of them.