It's about finally time to make the latest post on this here thread a recent one. This thread has helped make it possible for me to mod GTI and PSMD more than I ever anticipated. I suppose it's about time to give back and help expand the documentation of these games even more.
This all started will me desperately searching for the move data in PSMD, confused as to why waza_data_info.bin was so different from the same file in Gates to Infinity. (Turns out that was just for move IDs) I decided to finally study this thread more carefully (I've been lurking around here for months) and I came across Andibad's observations and it was actually act_data_info.bin that I was looking for. Anyways, recently I've been looking through more files, still using the information from here to understand them. At this point I have several notes on various files of interest. And since various links here are dead, I'll be giving up-to-date observations that will be refreshed as I gather new info. And although this data may be obvious to some, you might have your own notes, posted here or otherwise, I'll still leave them here for any newcomers, and perhaps we can compare notes.
For my first addition, based off Blue587's txt files, are notes for the pokemon_data_info.bin for PSMD. Pokemon Data Notes.txt
The only significant file I cannot understand even when using Blue587's notes is dungeon_balance.bin. I've made two whole attempts to understand it but I just can't.