HAcks Showcase in Emulation .
But you'll need LIPS , a patching program to pach the IPS . The community does not allow ROM linking , so search for a clean Ruby/FireRed or whatever ...
sadly , the SInnoh region has been invente after the GBA age ...
I'm pretty sure there are some hacks which have all Pokemon , but I am not such an expert ...
hey hii i am new to this community can u help me find a gud GBA pokemon rom which has pokemon from all the generations.?? i play these games on a GBA emulator.