Walking Pokemon Mechanics Heartgold

[Bonciu]

Hello! For the past week I have tried to find out every single thing about Pokemon Heartgold. I have indexed every text file and organized them and I found Text 265, which contains every following Pokemon Interaction. As a fun challenge I tried to get all of them, but there are over 700. I have gone in every area with every type of Pokemon and I still can't get some of them. They can't be unused, can they?

I was surprised that despite it's a pretty big feature, no one has looked into it to see how it works. The scripts (which there are over 800 of them) don't seem to contain info about what the interactions are in each location, but I have mostly looked at the data associated with the maps.

Is there anyone that researched this before? Is there a way to see where a string is used? And what are the odds for an interaction to appear? Or is it unique to a Pokemon? Please help I have done nothing but try to find them

 

[Bonciu]

Also Lyra (Text 663) details some interactions, but there still are some missing

 

[Bonciu]

As I see this is a hard question, I will ask a more specific one:
How do you get the "Pokemon is looking into the depths and shivering..." interaction?
You can get "Pokemon is staring into the depths…" on route 46 tall grass, but I have tried with multiple types and the interaction didn't appear

 

[Bonciu]

I made a spreadsheet for some reason to index every interaction and mood value
https://docs.google.com/spreadsheets/d/1VsecjaMqt2pmcozipOtvd-bD0wSzE71QBZ1VVBXibXQ/edit?usp=sharing
You can find the mood value of a Pokemon in a save by using PKHeX, under OT/Misc, Extra Bytes, 0x87.