Nintendo has not released the names of them yet, which means that they are probably still determining what to call them.
Yes, the six AR cards do come with the Nintendo 3ds
yes you get the AR cards with the 3DS. You can get a 3ds card to play free ds games on Nintendo 3DS.
The cards come packaged with the 3DS, but if you lose one you can print it out at the link below.
Six: the "?" card, the Mario card, the Samus card, the Kirby card, the Pikmin card, and the Link card. Most of the AR Games only use the "?" card.
go into the ar app then get your ar card out and follow the onscreen instructions. simples
Various applications and games such as: Mii Maker, Mii plaza, AR games, Face Raiders, N3DS Camera, Nintendo e-shop, Settings, and any other games or apps you download from the e-shop.
Luck and skill
you take it from laktiu
you have to first finish all the games in the yellow box
yes, you can download and print new ar cards from the official nintendo website
you can play with them on the 3DS.
Answer: Action Replay does work for the 3DS console, but as of right now (24 July 2013) no 3DS games are compatible with the Action Replay 3DS due to hacking problems. You can still use it on regular DS games but not on the current 3DS games. To sum up my answer the answer is yes and no.