Hi guys im just wondering what is the best and cheap way to play homebrew( DS rom and GBA rom) for the dsi.
The only way to play GBA ROMs on the DSi is to use the iPlayer for media player. It has added hardware that makes a GBA emulator possible. As far as I know, the iPlayer cannot play NDS roms though. To play NDS ROMs on your DSi, you will want a quality DSi flashcart like the Acekard2i. But you cannot play GBA games with it on the DSi. You can find the Acekard2i at www.dealextreme.com for only 13USD.