DS2Key sends PC Keyboard signals through WiFi so you can use your DS somewhat like a PC Gamepad.

Changes:

– Fixed bug with arrow keys sending numpad keys (2, 4, 6, 8).
– Fixed GH Pad repeat bug reported blahblahblaster from gbadev.org.
– Fixed CPU usage with server console versions.
– Fixed repeated sending of “/p?”.
– Fixed a bug with the mouse cursor sending negative values, causing wrapping in the linux version.

http://forum.gbadev.org/viewtopic.php?t=16352