I don't think it will.
All r4i cards work on 3DS. But you need to understand that the R4 cards does not work on the 3DS 3D games and only for DS games. For the first generation R4, it does not work on the cards, please refer to 'R4i cards' , 'Acekard 2i' , ' M3i zero'.
When using a regular DS game on the 3DS, the 3D slider does nothing.
Yes. In fact, it will have additional functionality on the 3DS and the DSi series
yes
yes there is. you have a choice of having the 3d on or off
Yes, dsi games works on the 3DS also DS games work on the 3DS.
For the 3DS, the 3D feature does not require 3D glasses to play so you do not need to buy 3D glasses.
There could be a few factors that causes this to happen: - The 3DS needs to have the wireless slider turned on - The NDS cannot play 3DS games so it will not connect if the 3DS is playing 3D games - Some games require both consoles to have the gamecard in order to link. (cannot use DS Download Play)
No, the 3DS is region locked. You'd need the US version.
Yes, but unless the game is labelled a 3DS game, you won't see 3D images.
No, dsi games work in a 3ds, wont appear 3d though, but the dsi does not have the ability to play 3ds games.
No, you can play regular DS games on the 3DS. However the 3D games can only be played on the 3DS :)