Is there any way to make a GBA advance game on DS play in full screen (instead of having that damn black border around the game). It seems like a shame to not be able to use the whole screen. I was also wondering the same thing about nes and other emulators. Do they run full screen or are they also in that black bordered box mode?
The DS is NOT a CRT screen. Therefore, playing any game that's not in its native resolution (the GBA has a certain pixel width x height size) will cause pretty horrible distortion. This is the same as trying to use a non native resolution on a LCD computer monitor. Try 1024x768 on a LCD to see what I'm talking about (you have to use 800x600, 1280x1024, 1600x1200, as far as I know, although I wouldn't touch a LCD computer monitor yet).
And the G6 is NOT an emulator! It uses the real hardware of the DS, but with fast memory to take the place of cart memory.
I suspect with a screen the size of a GBA, using a non native aspect ratio would look far worse than doing similar on a computer monitor.
And as the others said, the GBA had a smaller screen than the DS.
However...I thought the GBA had a more 'square' scren.... Is the DS in GBA mode already "stretched?"
If that's so, then using full screen could make things worse....