Aren't those the romhacks based on another series called Keitai Denjuu Telefang? Because if so, that'd be fun, since Gachasute was made by Smilesoft and Rocket Compnay, which made the GBA Telefang games (official ones, not the romhacks :p).
Though I'm not sure it'd fit the "GBA" category...
Though I'm not sure it'd fit the "GBA" category...