Depends. Get the DS lite if you want a cheaper console or you want to play Gameboy Advanced games. Get the DSi if you don't need to play GameBoy Advance games because the DSi is a better DS with more features such as taking pictures and recording your voice.
There is no such thing as "DSi Lite" but let me tell you this: at the moment of writing, ALL DS games fit in ALL DS's (DS, DS Lite, DSi, DSi XL)
Not really, the DSi will be worth more, unless the DSi is in bad condition, and the DS Lite is new. The DSi would have to be refurbished or very used and the DS Lite would have to be new. The game would also have to be a newer game, which would make up the price difference. Now, a DS Lite and 2 new games would match a used and or new DSi.
The DS lite and DSi are completely different pieces of hardware. You would have to buy a DSi, you can not turn a DS lite into a DSi
Yes you can. You can also connect DSi to DS and DS Lite to DSi.
Well you can trade your DS or DS Lite in at Gamestop and probably get an okay amount of money towards a DSi, but I can assure you no store would give you a DSi for an older model hands down.
They are for ALL DS SYSTEMS, DS, DS lite, DSi, and DSi XL.
No. The DS range goes 'DS', 'DS lite', 'DSi', 'DSi XL', and then there 3DS.
Yes you can. You can also connect DS lite to DS and DS Lite to DSi.
Yes you can trade a DSi for a DS Lite at Gamestop.
No, the DSi uses a different charge to the DS lite.
If you mean simply trading one system for the other, then no, you cannot. The Nintendo DSi is worth about $150 while the DS Lite is worth about $110. You can, however, trade in the Nintendo DS Lite and cash for the Nintendo DSi. If you choose that method, you will need about $40 or so more to cover the cost. You can also choose to trade in your Nintendo DS Lite plus a game or two for the Nintendo DSi.
No. The DSi and DSi XL does.