In fact there is a beta version of DSONPSP that can be downloaded from the link below.
http://www.megaupload.com/?d=1COOY2FS
It works with some DS games. I have tried a few games and these are the ones that were playable; "Kirby Squeak Squad" and "Yoshi's Island DS". On the link below I have provided the emulator with both of the games. Just unzip the file and put it on the game folder of the PSP.
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http://www.racketboy.com/retro/nintendo/nes/2008/03/best-nes-emulator-for-nintendo-ds-nesds.html
No, of course not! Pokemon is owned by Nintendo and PSP is made by Sony, a rival company. Nintendo would NEVER make a Pokemon PSP game, so the answer is no.I think you are able to download them, but that's not legal. No, THERE IS NO Nintendo DS emulator for PSP if that's what you are implying. There may be fanmade games (Which are legal, but of a poor quality.)
No a PSP
check the settings of the emulator, there might be a setting for that, otherwise you'll have to buy the game.
no get a life.