Zoids Legacy GBA

Code: Extra Zoids
Complete the game, then go to the title screen, and enter: L, L, R, R, UP, DOWN, UP, DOWN, LEFT, LEFT, R, R, RIGHT, RIGHT, LEFT, UP, START. You must enter the entire sequence before the demo starts. If you input the code correctly, you will hear a confirmation effect. You will have unlocked Diablo Tiger, Cyclopes Type One, Cyclopes Type Two's zi data and core.
Zero84

Code: More Zoids
Complete the game, then go to the title screen, and enter: R, R, L, L, DOWN, UP, DOWN, UP, RIGHT, RIGHT, L, L, LEFT, LEFT, RIGHT, DOWN, START. You must enter the entire sequence before the demo starts. If you input the code correctly, you will hear a confirmation effect. You will have unlocked Gilvader and King Gojula Zi data and core.