I'm saying not all games will work no matter what you do. The only game I've gotten to work "right" is Four Swords Adventures.
It's been reported that Metroid Prime also works right. Sonic Adventure 1/2 work very slowly (1 fps) Nintendo Puzzle Collection has a FPS desync (can't run both GBA and Dolphin full speed at the same time) and many others don't work at all. Crystal Chronicles needs a VBA-M savestate to function properly, and even then it can disconnect; which should tell you that this is definitely not a complete feature.
It's been reported that Metroid Prime also works right. Sonic Adventure 1/2 work very slowly (1 fps) Nintendo Puzzle Collection has a FPS desync (can't run both GBA and Dolphin full speed at the same time) and many others don't work at all. Crystal Chronicles needs a VBA-M savestate to function properly, and even then it can disconnect; which should tell you that this is definitely not a complete feature.