I'm having issues getting past the start screen. I followed the patching instructions, and the title screen says Pokemon 'Grand' Coliseum so the ISO file appears to have been patched correctly.
However, my controller is non-responsive on the start screen. I made sure that Dolphin is picking up my controller inputs and that the mapping is all correct. I can boot up other games and the controller works fine. I am also using the American version of the game.
Any suggestions?