How do I open this file?

[DMCA_Kupa]

Hiya DMCA_Kupa!

I've run into this problem a few times before, so let me try to break it down and help you out a bit:

The file named "arc" is a sort of archive that holds all of the data for the "fieldmap" section of the game.
All other files in that folder are marker/pointer files, and they individually point to a section of the "arc" file where specific data is stored.
However, I haven't been able to figure out what is what in terms of where the files point in "arc".
That being said, I have been able to find a pattern in the pointer files, that being that only three bits change across the files, at offset 30, 38, and 40.
Even included at the very bottom of "arc" is some hex that reads out to "tow.n03_cut", which resembles the name of the file "town03_cut".
In the end, I haven't been able to find a clear way of extracting individual files or clear data out of the "arc", but hopefully this acts as some sort of push in the right direction, alongside a quick bump to keep this fresh.

Hope this helps, cheers!

I guess somebody will have to make an entirely new unpacking tool just to open this type of archive then. I see why I can never find any assets from the first Fossil Fighters game now.