I have an EZ Flash Omege DE and I have been working on hacking the rumble feature of the cart into the game. Fortunately, I know the game has rumble built in for the gamecube gameboy player. I also know from a previous comment that the way these games work is by detecting the gameboy player and setting a flag in memory to enable the rumble option. I believe this should be as simple as finding the flag, enabling it, and swapping the rumble function to the one provided by ez flash. I have been desperately trying to debug the assembly in no$gba but have not had any luck finding either the flag or the function location. If anyone could provide me a better debugging strategy in no$gba that would be most righteous. Alternatively, if anyone can find the flag and function, or is willing to create the patch themself I would be willing to pay a $20 pay-pal bounty. For reference the guide to adding the Omega DE rumble code can be found by searching "rumble_tutorial gba temp" in google, this site won't allow me to add hyperlinks as a new user.