I do. I call it The Beast.

I used one up until GBA came out. I was never much of a portable gamer before that, as all I really played were Link's Awakening, the Dragon Quest I+II port, and all the mis-named Final Fantasy games. I remember going on a year-end school trip in 2001 or so and bringing it along. I got made fun of while my friends were playing Advanced Wars. = \