oh god i feel so confused please forgive me xD

how would i use link trade and link battle function with my boy emu Android?

i heard of VBA for computers to have ability to trade between 2 roms but never in android emulator.

Inter-compatible as in you can trade and link battle on any of the versions within the hack series and the sprites will still show up as the same sprites, instead of a new Pokemon showing up like a different Pokemon than it was implemented as. Say I add a Sylveon to the ROM and I link with a different ROM and it shows up as a discolored Machomp on the other ROM. With this hack series, that shouldn't happen if I can help it. Lol

So by inter-compatible, do you mean tradeable through VBA emulator for computer or something else?