Use FF6LE (not rogue and not rogue CE). I see it is not available on the wiki so here is a link: http://acmlm.kafuka.org/board/thread.php?id=4471
Not need to expand your ROM. Put your NPC on map and assign an event (for dialogue purpose at least) or $CA5EB3 for no event (return only). There is room in vanilla NPC data for some extra data. As for an extra event if can be placed outside the event range (banks $CA-$CC) but without expanding the ROM. Just check the ROM map and find a spot with free space (I know the end of ROM has a lot). When you use your B2 command to call an event subroutine, the bank argument start at $CA (00). So B2 01 80 07 would be a call to $D08001.
I made a video on this except I think I use expanded ROM but principle remains the same: https://youtu.be/K8RjNlH7AtQ
Not need to expand your ROM. Put your NPC on map and assign an event (for dialogue purpose at least) or $CA5EB3 for no event (return only). There is room in vanilla NPC data for some extra data. As for an extra event if can be placed outside the event range (banks $CA-$CC) but without expanding the ROM. Just check the ROM map and find a spot with free space (I know the end of ROM has a lot). When you use your B2 command to call an event subroutine, the bank argument start at $CA (00). So B2 01 80 07 would be a call to $D08001.
I made a video on this except I think I use expanded ROM but principle remains the same: https://youtu.be/K8RjNlH7AtQ