GpSPhone is a GBA emulator for the iPhone by ZodTTD.

Changes:

– Made for firmware 2.x.x.
– Adds MultiTouch! Press 5+ buttons at once.
– Addition of MultiTouch fixes Metroid Fusion controller issues.
– Sound is better. It has some gaps during slow playback.
– Faster and more stable iPhone & iPod Touch code.
– Added recent code for removing the blur effect filter when screen is scaled. This improved performance as well.
– Removed annoying ad view. Uses new ad view in a seperate window.
– Fixed the file browser bug.

http://www.zodttd.com/forums/showthread.php?t=3133