Not flashed yet, I tested in emulator.
Oh, I think it's the problem with the Donkey Kong 5 ROM.
auto
Moved the Super Mario Special 3 ROM to the last one and fixed.
I injected 12 games into Goomba Color, but I only found 3 games inside the ROM.
Is something happened to my brain or it's a bug of Goomba Color? I have absolutely no clue for it.
Since the SEGA Genesis and GBA both uses a Z80 CPU(?), and there's a video showcasing a bootleg SEGA Genesis emulator on GBA, I think it's possible to emulate it on GBA. The others' opinion are unknown.