When you get the Pal Pad from downstairs in the Pokemon Center, you can open it up to see your registered friends or add a new friend. After getting your friend's code, you can simply input the name of your friend (It doesn't matter what you pick, it automatically changes when register is completed) and then their friend code. It'll show up in the Pal Pad on the first slot. If it's a Sprite with a question mark, your friend did not add your friend code yet. When it's all successful, your friend's character will appear with their name.
No!
in the pal pad
yes
3DS games do not have friend codes, it is the friend code of the 3DS itself that you use, to be able to play multiplayer on a 3DS game.
get a pal pad and go to add friend
You can not. The only Pal Pad codes you can register are Generation V Games (Pokemon Black or White). You can not register Generation III or IV Games.
Yes, you can share friend codes. (If you have one) You go on your pal pad and then go under register friend code, and then you need their name and friend code. But they need to add you too.
Mine is ANDY and code is 193574248121. Wats yurs?
You talk to your friends, online or in person, and ask for them.
For Wii you have to be able to connect to wi-fi. Then go to friends and say register friend code.
You don't have to register any friend code on Pokémon X and Y since they appear automatically based on the ones registered on your Nintendo 3DS.
In any pokemon center go downstairs to the wifi club and get a pal pad then you will be able to enter your friend codes as well as view your own. Hope this helped :)