I was hoping I didn't have to pony up $70 for three games I already own. Buying the Collection on Wii was a last resort if my supposedly broken memory card still didn't work. I'm fully content with my GC versions of Prime 1 and 2, despite the price of hardware limitations in still needing a memory card to save.
I frantically looked over all my scans and realized I missed a creature in Agon Wastes. "Okay," I thought, "Scan him and come fight the final boss again. No problem..." WRONG! As it turns out, the creature I missed was one of the Alpha Worm things, with emphasis on the "one." The only Alpha Worm in the entire game is the one that gets possessed by the Ing and turned into the Bomb Guardian, a completely different scan after the transformation is complete.
Essentially, I was screwed from the start and didn't know it until the very end. Happy memories, but I did it again, and got my 100% scan file.