shyt is nearly old as me. Crazy that ever since it was released, they've been more or less unmatched. We had TurboExpress, Game Gear, WonderSwan, Neo Geo Pocket, PSP, Vita, etc. all try to take the but never had the same level of success nintendo's handhelds have had. Even the 3DS launch and the price cut soon after couldn't really damage'em.
GBA is the GOAT handheld to me, simply for the BC with three libraries.