It would be a lot of work, and it seems that no one that has the knowledge to do it has both the time and desire to put the required amount of work into it at this point. A lot of stuff has to be rewritten to have a chance at making it playable.
Originally Posted by woehrl
It's not impossible. GBA emulater on PS2 is quite possible, the problem is the work involved.
Originally Posted by peeman
TBH I don't even think the main bulk of the work is even all that difficult for someone who knows what they are doing. Getting GBA emu running on ps2 at all sure wasn't. It comes down to the smaller difficult parts and the bulk of work required to get it full speed (or close enough to be playable) that makes it a crappy project.
Shoot Pixels, Not People.