No, 3DS games only work on the 3DS and 3DS XL as well as the 2DS
No, 3DS games can only be played on a 3DS.
No Nintendo DS games work on Nintendo DS game consoles and maybe some other Nintendo and not on any of the Xbox or PlayStation game consoles regardless of the country or region.
No, 3DS games only work in a 3DS or 3DS XL.
The Professor Layton games can be played on different game consoles. Some of the game consoles that support the Professor Layton games are Nintendo 3DS and Nintendo DS.
Yes, Pokémon Omega Ruby and Pokémon Alpha Sapphire are 3DS games and therefore they're available to be played on any of the Nintendo 3DS or Nintendo 2DS systems that can play 3DS games and that includes Nintendo 3DS, Nintendo 3DS XL, Nintendo 2DS, the New Nintendo 3DS and the New Nintendo 3DS XL.
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.
The 3DS consoles are manufactured for Nintendo in China.
It depends on which Nintendo console you are referring to. Nintendo 3DS games can only be played on the Nintendo 3DS, Nintendo 3DS XL and Nintendo 2DS. All other Nintendo consoles including the Nintendo DS and Nintendo DSi cannot play Nintendo 3DS games.
No, the Nintendo 3DS and the Nintendo Wii U are two separate consoles. Though there are some linking features between the two, you cannot use the Nintendo 3DS to play on the Wii U.
The 3DS has its own games that only work on that console because they're too advanced for the older ones. But it plays regular DS games too.
No, 3DS games can only be played on a 3DS.
The Nintendo 3DS is backwards compatible with Nintendo DS titles, so all DS Pokemon games and subsequent 3DS Pokemon games will work on the 3DS.