Please stop using emulators.
First off, it's not like a computer where you have a controller.
Secondly, LR buttons? Horrible placement.
Just buy a GBA SP.
If you have the money, get the AGS-101 with a brighter screen.
SP is fairly cheap, I got a dirty ass one from craigslist, and about 6 games, 5 were Pokemon ;), and I ordered a newly made shell on eBay for $5, re shelled. Ended up $30 for 6 games, a working system, and a $120 profit.