We have 2 cheats and tips on GameBoy. If you have any cheats or tips for Double Yakuman please send them in here. You can also ask your question on our Double Yakuman Questions & Answers page.
At her secret picture, enter the code Up Down, Left, Right, Up, Up + A, Down, Down + A, Left, Left + A, Right, Right + A, B, A + B, Right, Right + A, Right + A + Select, Left, Left + A, Left + A + Select, Down, Down + A, Down + A + Select, Up, Up + A, Up + A + Select, B, A + B, A + B + Select.
The credits can be viewed by going to the 'Title' screen, holding either Left or Right on the D-pad and pressing B.