I have a GBA emulation question.

I don't exactly get why flashcarts like the iPlayer and the DSTwo can emulate GBA games, but others like the Acekard 2i can't. I know it is probably difficult for someone to develop homebrew that makes flashcarts be able to play GBA games, but is it possible. ??? ??? ???

no its not possible. iplayer and dstwo contain their own CPU and ram.