I've got about 9 hours on the clock, 40%+ Items, and 70%+ scans, in the fortress (3rd area) not too far before Spider Guardian. Trying to figure out just how the hell you're supposed to scan it :(
Scan it before you go into the morph ball thing; it crawls around the sides of the doors.
For anyone who's stuck on the last boss,
For anyone who's stuck on the last boss,
if you beat the 2nd to last boss, then die on the actual last boss, don't reset; choose to continue from your last save and you will be right at the last boss. However, the next time you load your game or reset, you'll have to fight both bosses again.