You can't trade JUST you DSi system in for a 3DS system anywhere.
yes you can
no but you can play Nintendo advance games on a Nintendo ds
Nope. Regular Nintendo Entertainment System games (referring to 8-bit Nintendo/NES) are not compatible with the Super Nintendo Entertainment System (16-bit Super Nintendo/SNES).
Yes you can OR you can trade your Nintendo DS, $100 and 2 unwanted games for a Nintendo DSi.
Yes
EB Games or Gamestop.
Yes you can you can can can!
No
While you can't trade an older system for a newer one, you can certainly trade a DS/DS Lite in for credit at GameStop or stores like it.
The best place to buy a new DSI gaming system is the official Nintendo website, where the DSI gaming system can be up to %55 off! If you buy from Nintendo's website you also get credit to trade in for great prizes, such as free games and more!
No u cannot but u can play gameboy games on a Nintendo ds