And, you can't play any GameBoy (ie. Brick) games on the DS.Cowabungaa said:But you can't play GBA games on a DSi.
If you really need to play GBA games, you can get a GBA SP for cheap.
As I can see, the only reason to get a DS over a 3DS is to transfer GBA pokemon to DS pokemon.
However, if you haven't gotten a DS by now, you're most likely not into pokemon to begin with.
So, if one can afford it, I'd suggest getting a 3DS now, rather than getting a used DS and possibly upgrading later.