Caught Unown Save Data

[Turaiel]

Hi all,

I've been writing a simple script to generate a CSV of Pokemon that I have seen and own in Pokemon Crystal, based on the data in the save file. The only thing I'm missing is identifying which Unown types have been caught. The save data structure documented on Bulbapedia doesn't seem to have this info or anything that looks like it could be used to calculate it. I didn't find any documentation on the Gen II save files here either, but maybe I'm just not good at using the search function.

I'm sure this information is somewhere in the save file, but I have no idea where I should be looking. Does anyone happen to know what offset and format this data is kept in?

Thanks!