There will be only one reason that if your Nintendo 3DS won't open i.e because it is not charged, PS: It can also be a fault in the console, you wouldn't be lucky if that happened.
Having your 3DS in the cradle will not affect how the system operates. The system will wake up from sleep mode when you open it, just as if it was not on the cradle.
you need a wifi connection
Yes, you can. When you connect to the internet with the Nintendo 3DS, open the Nintendo eShop application. Under the category of 'Demos', you can download demos for free.
It will work on Nintendo ds lite, Nintendo dsi and on the 3ds. It wont be in 3d though
Yes, the Nintendo 3DS LL is the Japanese name for the Nintendo 3DS XL
The Nintendo 3DS is created by Nintendo from Japan, hence the name 'Nintendo' 3DS
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.
update your Nintendo 3Ds
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.
Nintendo 3DS sucks, instead get a DSi that comes with a transformation tool to a 3DS.
Nintendo had a rumer that super mario galaxy will come to the 3DS but we wont know until 2013 or 2014
One can find a Nintendo 3DS and a Nintendo 3DS bundle on Amazon. Amazon sells Nintendo 3DS and Nintendo 3DS bundles on their website at a reasonably low price.