Yu-Gi-Oh! Sugoroku no Sugoroku Game Cheats for Platform Game Boy Advance

Yami Bakura:

Press L, Down, Right, Left + B, R, Down(2), A at the title screen. The title text will flash to confirm correct code entry.
Yami Yugi:

Press R, Left, B, Right, Up + R, Right, Down, A at the title screen. The title text will flash to confirm correct code entry.
Kaiberman:

Press Down, B, Left, Right(2), R, Up + R, A at the title screen. The title text will flash to confirm correct code entry.
Mutou Sugoroku:

Press Left, Right + B, Right, B, R, Left, Down, A at the title screen. The title text will flash to confirm correct code entry.