Yes.
no
Unfortanatly you can NOT do that because the PSP is more then the Nintendo Ds and they are in diffrent companys. Sorry
Yes you can, many places will give you a PSP in exchange for a DS, and a sum of money to cover the difference.
your choose
PSP because a DS you only go left and right and PSP you can go anywhere
You can Maybe trade 2 used psp's for a used go at gamestop
no you can not
Just trust me PSP by far you can go on the net
If you trade in 3 games with a PSP 2000 or 3000 you get $100 credit for a PSP Go.
you could just go to google and download the ds emulater for psp
No. because the PSP costs more. But you can probably trade A Sony PSP for a Nitendo DSi. =] yes actually you can you just need extra money
Yes and no. Yes being you can turn your Ds in at a gamestop and get a PSP, and no being that you will still need to pay some money due to the fact that they will not give you a PSP for just turning in a un-equivalent system.