Sorry, but you cannot. Once you format your dsi, you can never recover the lost data. Only format if you plan to sell/give your dsi, or if you aren't playing it anymore.
NO, a PSP's memory stick is a memory stick pro duo. A dsi's is a sanDisk
You need an SD memory card.
256mb
none
no.
I am not sure I am going to try it tomorrow and I will get back to you on it. (I am only 10) NO!!! DO NOT FORMAT I DID AND LOST ALL MY GAMES AND GOT LEFT WITH 100 POINTS INSTEAD!!!!
You cant
If you format your dsi everything will erase from your dsi including ur things from your memory card.
It doesn't 'need' a memory card (Memory Stick is a Sony card, the DSi uses SD cards), you can play games without using one. A memory card would be for storing lots of photographs, MP3s or DSi store games.
Yes, the DSi (and XL) use the same memory cards as the Wii does.
nope psp takes memory stick pro duos, dsi takes sd cards :)
Only when you have filled up the DSi's 256mb internal memory