Here are the ROMS for Shining Force II: The Sword of Hajya and Shining Force III: The Final Conflict for the GameGear.
I don't assume responsibility for any legalities involved in downloading ROMS! If you don't own it already then you are supposed to erase it 24 hours after you first downloaded it. I really don't care if you do! I'm not the computer police! But this is my lame disclaimer.
I just found the English version of Shining Force II: The Sword of Hajya and here it is:
shiningforce2-eng.zip Size: 378KB (378,091 bytes)
Shining2.zip Size: 380KB (380,258 bytes)
Shining3.zip Size: 403KB (403,284 bytes)
And here is the emulator that I use to play the ROMS.
Massage.zip Size: 250KB (250,341 bytes)