GBA Slot

Is there any way for the no$gba emulator to recognize a game in the GBA slot so you can get the extras in the DS game?
(example pokemon fire red in the gba slot while pokemon diamond is in the ds slot, or megaman battle network 5 team colonel in the gba slot while megaman battle network 5 double team ds is in the ds slot)

Not at the moment, no. Currently, there's no NDS emulator that can do that.