I don't think you can...
Chat with our AI personalities
No, there is no way to do so. The 3DS will support Miis, though.
The Nintendo DS lite does not support and cannot download Miis.
um..... no
Unfortunately Not, you will need the Nintendo 3DS.
Yes, the DSi can connect with the Wii just like an ordinary DS can with game demo downloads, new game features, and Miis in some games.