idk if this is just a ps2 thing but the nitrus brio bossfight refuses to load on my disk. Is this just a matter of the disk being scratched or is there a fix?

That sounds like your disc, unfortunately. I don't think I've ever heard of anyone having issues with Brio on any console, so it's likely just scratched in a way where it won't load.

yeah it's ur disk, gonna need to just buy a new one :(