This is a revision of DX Bakenou Z released for the Game Boy in Japan. The 'Rev A' designation indicates a later version, likely featuring bug fixes, minor tweaks, or possibly even small content updates compared to the original release. Without access to patch notes or detailed version history, the exact differences remain unknown. It's important to note that this version is targeted at the Japanese market.

DX Bakenou Z (Japan) (Rev A)

Duck Tales 2 (USA)