A nice thing to have, not completely necessary, but it makes you feel like a Nintendo tech! My copy had some trouble when I first tested it, the "game" would go blank, but I opened it up, cleaned the PCB and it works perfectly now. All in all a cool little cart to have
It works and its fun to make noises with it.
Works great to ensure that the system is functioning like normal.
What can I say the cartridge does exactly what it is intended to do. Made sure my GBA was fully operational.
Love this cartridge It's amazing I wish I had a cartridge for my other Nintendo Systems along with my Sega Systems.