Dual Mode: NDS+GBA

Yo, I'd like to emulate 1 NDS ROM and 1 GBA ROM at the same time, and link them.
the purpose is to use pal park in Pokemon diamond, with pokemon from emerald/leaf green etc.
I'm using NO$GBA 2.6 (or whatever that is, latest version anyway :P)Thanks a lot :)

Even most flashcarts don't support this function.I don't think the emulator does.

Yes I wanted to do that as well but it's not possible to do it with the current version. They might not even incorporate it.