No, the 3DS charger is different than the DS charger. However, the DSi charger (as well as the DSi XL) is the same as the 3DS and 3DS XL
yes
When you bought the DSi a charger, it should of come with one. If not you can easily buy a DSi charger from any gaming stores. Also a Nintendo DSi XL charger as well as the Nintendo 3DS (and XL) charger will work since they are the same.
No, though it can use a DSi or DSi XL's charger.
No, 3DS games only work on the 3DS and 3DS XL as well as the 2DS
When using a regular DS game on the 3DS, the 3D slider does nothing.
no
Pokemon Black is a regular DS game and will work in any DS, DSi or 3DS model.
Yes, the Nintendo 3DS (as well as the 3DS XL and 2dS) has its own 3DS games that will not work for the Nintendo DS, Nintendo DS Lite, Nintendo DSi, and Nintendo DSi XL.
Yes. In fact, it will have additional functionality on the 3DS and the DSi series
Yes, dsi games works on the 3DS also DS games work on the 3DS.
No, it is a 3DS game, it can only do DS download with another 3DS.
Regular DS games from the UK will work on a 3DS from any region, including the US. It is only the 3DS games that are region locked, so a UK 3DS game would not work.
No, they only work on the 3DS platform. But, you can play DSi and DS games on your 3DS.