RACE PSP is a Neo Geo Pocket (Color) emulator for PlayStation Portable.

Release notes:

The latest release of RACE! PSP includes state saving, and the test switch that I mentioned earlier. The switch enables developer-level access to Card Fighters’ Clash, Card Fighters’ Clash 2, Dokodemo Mahjong, and possibly other games. To enable the switch/button, map it to any PSP button via the ‘Control’ tab — it’s disabled by default. With regard to save state feature, I ask that you take its functionality with a grain of salt — at least until more folks report how well it works.

http://0xff.psp.akop.org/