Like the VBA, this is the best DS emulator. It's not the greatest GBA emu, but it crushes all the other DS emu's. It's a lot more faster that the other ones like deSmuME (just my opinion) and it's a lot more faster if you have the No$Zoomer plugins. It's save functions aren't that convenient and so are the loading function,but at least it can save states. I'll edit this if I get more info.