Put music on an SD card with a MP3 and put the SD card in the dsi and go to the music section.
You can't. If you want to add music, you need an SD card.
No It Is Not Possible To Connect It To A Dsi
Sense the P.S.P. is made by Sony, and the DSi is made by Nintendo, they probably wont connect.
Yes you can. You can also connect DSi to DS and DS Lite to DSi.
Yes, the DSi can connect to the DSi store, from which games can be bought and downloaded.
Yes the dsi has internet connection
Here is the answer for dsi. you can use an sd card to put the music on your dsi.
The DSi needs to connect to a wireless system to work and you should get wireless connection for your DSI because guess what? you can get on-line any time!
Yes you can.
Yes
Yes
Yes, it can.