You don't under stand,
Acekard 2 = DS compatible flashcart
Acekard 2i = DSi compatible flashcart
get it now, there are a lot of DSi compatible flashcarts on the market, alot of them used to work in DSi mode of the 3DS, but 3DS updates killed them off. DS only compatible flasharts never worked in a 3DS.
The dstwo is a DSi compatible flashcart
Acekard 2 = DS compatible flashcart
Acekard 2i = DSi compatible flashcart
get it now, there are a lot of DSi compatible flashcarts on the market, alot of them used to work in DSi mode of the 3DS, but 3DS updates killed them off. DS only compatible flasharts never worked in a 3DS.
The dstwo is a DSi compatible flashcart