Many difference....CPU,FPU,and ........
I'm so sorry of this,but you can't play Super Mario Bro(FC ver.)on your GBA,it's impossible...
Super Mario Bro(FC ver.)only runs on Famicom or Famicom Emulator,it's impossible to run on GBA.
But i heard Super Mario Bro have GBA version,you can download it at many Emulation Web Site,and write the game into your Supercard,or you can buy this game at many game shop for GBA.
