8 Dragons question

You can change the opcode argument to call a different pack, change the existent pack to call a different formation or change the existent formation with a new enemy. You have more than one option.

So in the end, I can in fact change the monster in the formation like I mentioned in my first post and everything will be fine. That was the answer I was looking for, since I don't feel like getting in to hex editing at this point!

The white dragon in the Veldt is unrelated with the mentioned code/event. The white dragon will only appear in the Veldt after you defeated it once and it doesn't affect the counter of defeated dragons. The related event code will never be executed in the Veldt.

Yes, I already figured this part out for myself - but if I don't want the White Drgn to appear on the Veldt anymore while introducing another monster, then the monster ID has to be below below 255 or the formation below 512. This is why swapping the monsters is a perfect solution to accomplish all.

Is the removal of the White Dragon from Veldt one of the ultimate goals here? I was under the impression that just adding Prometheus was what you wanted, in which case I feel my Intangir suggestion was still sound. Otherwise, it seems you have your answer either way!

Yes, removing the White Drgn from the Veldt was the main goal. Alongside Marshal, it is the only boss on the Veldt that really doesn't belong. However, I did actually change my mind about which monster to replace it with. Rather than have Prometheus, I am making ProtoArmor work instead (since it already appears on the Veldt, but without the possibility of a Rage). I already swapped Marshal with Mega Armor as well, so you can now rage them both. Prometheus is still unobtainable, since all the Rage slots are filled, and I know of no other bosses in the Rage list that shouldn't be there.

Then again, I wonder if Chupon or Siegfried really belong on the Veldt? The General Leo edition hack adds them, but they are bosses...