GBA WarioWare, Inc.: Mega Microgame$ - Japanese Version - Cartridge Only Nintendo Game Boy Advance software WarioWare, Inc.: Mega Microgame$ (Japanese version). This is an authentic/genuine Japanese version. It is not a bootleg or pirated copy. It was working without issues when I used it before. I no longer have the console, so I haven't confirmed its current functionality. This is a cartridge-only listing. It is a used item, so there may be minor scratches, but the label condition is relatively good, I think. Please check the photos and consider purchasing.