No.
You buy ds or 3ds games and then put them in your 3ds.
slide an put you passcode in
i don't think you can put a pass word on the ds:(
Unless you have a Japanese 3DS, you can't.
no you dont need to put password to activate your 3DS in the beginning, you put your own code in the first time you turn on and use you 3DS.
Not individual games no, but you can passcode lock certain game ratings through parental settings or you can just put a passcode on certain accounts through account settings
While Flipnote Studio can not be put on the 3DS legally, Hatena is working on a 3DS version called Flipnote Memo.
No the Nintendo 3DS was invented from Nintendo based in Japan. The Nintendo 3DS was Built and put together in ether china or Thailand. The Nintendo 3DS is Japanese.
No.
unfortunately, no
No... they haven't made gameboy games for 10 years.
No, you can't.