All Things Event Hacking

If anyone is still struggling with the 4d xx yy command, I noticed that xx will directly correspond to pack index 255-511 in the FF3usME formation editor. There's plenty of empty formations, and you can just set all possible encounters in that formation to your boss and you're good to go!

You're right. There is 512 packs and and only 256 fit on one byte (FF). Since most of the battle triggered by event involve bosses, it's the reason why the 256 formation available in command 4D are packs 255 to 511 where all the bosses are.

Packs 410 to 511 are totally empty and formations 564 to 575 are empty too but I've read somewhere that some of the empty formations are unusable.