My son has been wanting to play Star Wars Battlefront on PS2, so I finally got it out and hooked everything up only to find I no longer have any Dual Shock 2 controllers. "No big deal," I think, since they are barely different from the DS1, of which I have about 20. Only to find out Battlefront requires the DS2. I've looked just about everywhere, and the only thing I can think is that I included DS2s whenever I sold extra PS2s and didn't notice, since I wasn't actively playing anything PS2 at the time.
I suspect I've done similar with N64 Goldeneye and NES Metroid (gray), Fester's Quest, and a couple others. There have been other items that have been so thoroughly misplaced that I've been shocked to discover them long after I'd written them off. Mario Paint is a good example there, as I needed to test an extra mouse, but couldn't find the game at all. Just found it in a box of misc. stuff that I had no memory of at all. I blame cleaning up, never a good idea cause I can never find anything after.
So what items from your collection have gone "missing" in one way or another?
I did a little (very little) looking, and didn't see this topic covered anywhere, but point me there if you know of it.