We have 3 cheats and tips on GameBoy. If you have any cheats or tips for Spy vs Spy please send them in here. You can also ask your question on our Spy vs Spy Questions & Answers page.
To play the final stage enter the password: Z4W4P
To choose the stage you want to play in the game enter the password: 15Y24
At the 'Mode' menu where you select to play 'Vs Com' or 'Vs Player' make sure the star is next to the 'Vs Com' option and that no other Gameboy Color is connected. Then hold 'Select' and press 'Start' to view the demo play.