As shown here http://www.gc-forever.com/yagcd/chap9.html#sec9.1 it is possible for N64 controllers to show up to the bios, therefore if it were used instead of a GBA via a pin adapter, it would be possible to dump Gameboy games and saves plus n64 saves
As shown here http://www.gc-forever.com/yagcd/chap9.html#sec9.1 it is possible for N64 controllers to show up to the bios, therefore if it were used instead of a GBA via a pin adapter, it would be possible to dump Gameboy games and saves plus n64 saves