Can you but Pokemon FireRed on your r4 card?
yes you can
put you can't play it XD
if you have a 3-in1 pack (Expansion Cart) for the eazyflash (or
however you write it) and then put the GBA ROM on the Expansion
Cart and then you can play it with on your ds
oh one tip
don't buy a whole package only the Expansion Cart and download
the firmware for the flhascard you need, delete the firmware from
your R4 and put the firmware from the easyflash (what you
downloaded for free) on the card