data - Shintensu/Nippon GitHub Wiki
This is the main folder containing any game assets, named data_pc on PC and data_switch on switch.
In this part of the wiki only the entity/asset names will be used, excluding any extensions. Some files may have _f, _g or _j suffixes. Those indicate that they are their French, German and Japanese variants respectively.
Encryption
All files on PC are encrypted by default, apart from .afs2 and .cid files.
If the folder is simply named data on PC, this is where the game will read files from if encryption is disabled.
To disable encryption one must change the code at main.dll + 0x15269D from 0x01 to 0x00. (This value can be dynamically changed at runtime, allowing to essentially hotswap between encrypted and non encrypted files).
Then to prevent crashing, one must change the code at main.dll + 0x4B5C6D and main.dll + 0x4B5FA4 from 0x0C7f to 0x9090.
st/r
The st folders are the different sections of the game. The name likely comes from "Stage".
The r files within the Stage folders are the different levels within the Stages. The name likely comes from "Region"