Pony Fantasy VI Remake

So, this Location Editor to let me change NPC sprites. In tandem with the expansion thread, is that how I can make more unique NPC sprites and replace them on the maps?

The link you provided is about expanding the number of different battle sprites, but Caton seems to have working NPCs (see this post). I'm not sure where his progress are. You'd also need a modified version of FF6LE he has.