what is this for? I don't really get it

what is this for? I don't really get it

There are a few instances in the gen4 games where the raw tile-data of a 4bpp is embedded into the game code, e.g., the tiles used by the healthbar and status icons in battle. The idea here is to be able to store those as PNGs in the source trees, so they need to be converted into a table of bytes that can be #included into the code at build-time.

Emerald solved this with scaninc as a custom preprocessor; neither Platinum nor Heart Gold use scaninc, and asking either to take on that dependency instead of enabling this as a feature of nitrogfx seems less than ideal, IMO.

ok that sounds fine, will give it a proper review later, but for now changing the preprocessor constant would be a good start