If you are referring to playing wirelessly, I believe it depends on what game you are playing.
100
to register your friends your friend must have a 3ds with swapnote also and then once you find them you have to enter there code
There are many nintendo sites that fan share fan codes on. People can collect many friends on them.
A 3DS code is a code where people online share their own unique code to add into your 3DS so you are friends online
A friend code is a series of numbers which allow friends to connect through the Nintendo 3DS network.
The 3DS' 'main' mii is used on the friends list and Letterbox for example, but you can specify a different one for the streetpass games on the Mii plaza.
Nope. The 3DS does not include Pictochat. But a way to communicate with friends is to use Swapnote, a free download from the Nintendo eShop.
Dalmation and Friends Chihuahua and Friends Dachshund and Friends Labrador and Friends Best Friend edition Nintendogs and Cats ( only for the 3DS )
You, and another 3DS owner can either meet in person and become friends, or exchange Friend Codes. From there, you can exchange short messages (statuses) or join each other's games
well,go on your friends list go to a friend card.Look upper right and you'll find the icon "Delete Friends"
Same as friending with a DSi and DSi
The before r4 ds card can't be used in Nintendo 3DS console. But there are many new r4 3ds card, wich can run perfectly in Nintendo 3DS. Such as r4 3ds from r4idsn.com, 3ds card, r4i sdhc 3ds, r4i gold 3ds, acekard 3, TT 3ds and so on. Yeah!
Nintendo 3DS release for some days now, and there are many flash cards can break 3DS well, such as M3i zero, acekard 2i , R4i 3DS, supercard dstwo,i will recommend you M3i zero, it is one of the old and best card, and it is updateable, and will never blocked by Nintendo.There are many 3DS card in the market currently. such as 3DS card, R4i 3DS, R4iTT 3DS, R4i SDHC 3DS, R4 3DS, Acekard 3, M3i Zero and so on. All of them can run DSi games on Nintendo 3DS.