Okay, I know what he did, and I understand why he did it. Chaos Rush couldn't fit the last five enemy names under the bank "Enemy Names". He had to place them in the "Battle Messages" bank, and they appear right after message number 116.
Under the "Battle Messages" bank (bank offset 0x1738d), including the placed enemy names at the end, there are 92 free spaces.
My course of action to edit the battle messages is to delete those five enemy names (IrnGiant, Tiamat, Be[el]zebub, Astaroth and Emperor) in the Battle Messages bank, update the pointers (I'm not sure if these enemy names correspond to the pointers in the Battle Messages bank or the Enemy Names one...), do my battle message edits, and insert the enemy names at the back of the edited messages.
...Or something. I'm very new to this, but I have to eventually do something similar for FF8 PSX. I'm guessing the pointers for Battle Messages is above 0x17367, judging from your reply in Chaos Rush's post about changing Mana to M.Power (based off his patch). I'm not sure where the pointer header starts or if it works the same like with the dialog banks.
Any help would be appreciated.
Great news: I can find the pointers using an untouched FFII rom. As the program is able to still compile the whole bank with it, I was able to find the pointers by comparing the modified and the unmodified non-patched JP roms. Although it is annoying that I have to manually update the pointers, I'm glad I'm still able to edit what I want.
I haven't gotten to the remapped enemy names yet, but I'm sure the pointers for those are still in the Enemy Names bank.