Anybody knows why there is gba slot in ds boxes?

Slot 2 Dust Cover Door For Nintendo DS Lite NDSL & Game Boy ds slot They removed the GBA slot because they don't care about my happiness Pretty much sums it up dsobet slot ds,dselectronic,racing,products,slot,actualslot

ds with gameboy slot slot , lateral stop members secured to said shifting lever and adapted to DS 14 Figs LT ތ 174753 Fig 4 Theodore A Lanscha , Chenoa