NO, the 3DS have a region block, only American 3DS can play American games and only pal 3DS (from Europe) can play pal games and also only Japanese games can be played on a Japanese 3DS
While the Nintendo 3DS is region locked, if you purchase Pokemon X and Y from the Nintendo eShop or buy the game from your local store (or any PAL region store), the game will work on a European 3DS. It will only not work if you buy an American or Japanese version.
No, 3DS games will only work in a 3DS.
No, the 3DS is region locked, a US game will not work on a European console.
When using a regular DS game on the 3DS, the 3D slider does nothing.
3DS games are region locked, a 'French' one (actually an EU one) will work on any European 3DS, and also the Australian one.
Unless you have a Japanese 3DS, you can't.
The DSi and 3DS can link and work together if they are both playing DS/DSi games. They will NOT link when the 3DS tries to link while playing a 3DS game.
The 3ds supports all DS, DSI, and 3DS games. Like the DSI, it no longer supports game-paks for the Game Boy Advance.
They should, yes. They are both what Nintendo classes as the PAL region. However, many 3DS consoles sold in India turn out to be imported from the USA and would only work with US/CAN games.
Unless you have a Japanese 3DS, you can not change to a Japanese region.
All 3DS' are region locked, so you cant play an american game on a british 3DS and vice versa.