8 Dragons question

Hmm. I'm not sure how the game counts the dragons currently. Have you tried any other methods of changing the Veldt's battles?

So far I've realized that the Veldt pulls battles based on the monster formations list. You can see these in FF3usME under the "Form" section, and Formations tab. You see here the list of Veldt battles is assorted into "groups" which is basically the exact same list as what the game has for monster battles. It's not chosen from the monster list itself. For example:

0 Lobo
1 Lobo, Lobo
2 Guard, Guard
3 Bleary, Bleary, Crawly
4 Lobo, Lobo, Marshal
5 Hornet, Bleary, Bleary, Bleary, Hornet
6 Leafer
7 Leafer, Leafer, Dark Wind

- Is the first 'group' of battles the Veldt has. This happens to be the first 8 formations listed in FF3usME as well. You'll notice that the 2nd, 3rd, etc groups also align with this list.

The White Dragon is formation 481 (group 61 second formation) on the Veldt. Prometheus's formation number is 457, which should be in group 58 second battle. You could also switch the monster formations around (make Prometheus formation number 481 instead of White Dragon), this would mean you would have to change other code to allow the boss fight to use formation 457 instead of 481. Else you'd be fighting Prometheus in Cultist Tower.

According to madsiur here: the Veldt battle groups are stored in RAM (Field RAM to be specific if you want to search it on the site's documentation). There's 64 bytes, each with 8 bits exactly (64 groups of 8 monster formations each).

So to change add/remove/change formations on the veldt you must play with monster numbers and formation numbers as well as which monster is in which formation. There is no pre-existing veldt list in the ROM. It's created and updated each time you win/escape a battle.

Might also be easier to switch Prometheus with Intangir. Since that guy only does fight and Pep Up for rage commands. He's formation 210

It should be noted that the "Won't appear in Veldt" option in FF3usME seems to do nothing, as Prometheus and White Dragon both have this unticked. This means both should appear in Veldt, but only White Dragon does. I could be wrong about this part though...