GameBoy/GameBoy Color Emulator for PSP with Multi-Player

What I need to know is, does anyone know of a GB/GBC emulator on psp that supports multi-player. I have seen numerous emulators on psp with multi-player capabilities, including SNES and NES.If anyone could help or knows anything about this sought of thing I would really appreciate it.Thankyou,
Sexywogboy