DS lite chargers do not fit a 3DS.
Yes, the 3DS has backwards compatibility to DS and DSi games.
Yes the 3DS and DS lite are the same size
3DS games cannot be played on a DS lite. You need a console from the 3DS family - 3DS, 3DS XL, 2DS, New 3DS, New 3DS XL.
No, the Nintendo DS lite cannot play 3DS games.
No, the DS lite charger will not fit. You'd need at least the DSi/DSi XL charger which is the same as the 3DS one.
yes but 3ds games don't work on a ds lite
Yes, and vise versa. But 3DS games can only be played on a 3DS.
No. But, you will be able to play ds lite games ont the 3DS.
Yes, you can. The 3DS can link with the DS to play DS games but the DS cannot play 3DS games so linking for 3D games will not work.
No the 3DS game cards are shaped slightly different then the Nintendo Ds. Of course if you could put the 3DS game cards in the Ds lite it would still not work because the features and intense graphics the nintendo 3DS requires for games can't be used on the Ds lite. Don't buy 3DS games for the Ds lite as it just won't work. You can consider buying a 3DS however as the 3DS is backwards compatible with all DS games.
Yes you can play regular ds lite games on the Nintendo 3ds, but the regular ds lite games you can't play in 3d.