I had invested a lot of time into Baten Kaitos: Eternal Wings and the Lost Ocean not to mention numerous other GCN games, but one summer, my dad and I had such fight that I went over to my friend's house and stayed there for a few weeks.
Over there I called my mom in the hopes that she'd send my Gamecube memory card so I could resume my progress in Luigi's Mansion, Baten Kaitos, Twilight Princess, etc.
My mom told my dad, and in their infinite wisdom they hid my memory card. Yeah. My dad's a crazy control freak, and he's always hated my video game hobby.
Anyway, even months later, my mom said she couldn't find the memory card. I wouldn't be surprised in the least if my dad actually destroyed the card altogether.