Yugioh! Dual Monsters Cheats

Super Lair card

Select campaign mode at the title screen, then press Up, Down, B, Down(2), Up + B, B.

Yoshis Cookie Cheats

Cheat mode
Set these features in the Options menu.

Speed: High Music: Off Level: 10

Then highlight Level and push Select until the desired level is displayed. (Note: Cookies will be transformed into monsters.)

Expert mode
Complete all 10 standard levels to play harder levels.

Yu Yu Hakusho 4 Cheats

Fight as Raizen
Select “Vs. Comp” mode and highlight Enki. Then hold Select + B and press Right.

Fight as Lei Zhang
Select “Vs. 2P” mode and highlight Enki. Then hold Select + B and press Right.