Nintendo DS emulation in PSP (proof of concept) - YouTube
testing out the DSONPSP Emulator for PSP (Nintendo DS On PSP) - YouTube
UK:RESISTANCE: NINTENDO DS EMULATOR FOR PSP
Amazon.com: NZYMD Handheld Game Console Portable Video Game Console 4 Inch 10000 Classic Retro Game Console Support Emulator MAME/FC/GB/GBA/GBC/MD/SFC/PS1/N64/PSP/3DS/ATAR 12600/ATARI 7800,Black : Video Games
Nintendo DS Emulation on a PS Vita (NooDS Vita Port) : r/vitahacks