I am looking for a GBA flashcart for NDS to play GBA games and GBA homebrew. I've been reading about EZFlash 3in1 and it looks good - but you can only store one game at a time and I am not sure on how do you inject the roms to the cart. Is there a flashcart that you can store multiple roms (MicroSD would be cool) and access it from a GBA game? I want to trade Pokémons from R/S/E to D/P/P. Any inputs are welcome!