Zoids: Legacy

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.

Go to any Zoids Institute and talk to the scientist who repairs Zoids, develops Zoids, etc. Then, leave the Institute. Your HP should be full. If not, repeat.

The weapons that come with the Zoid you use are usually more powerful than the weapons that you can purchase. For example, the Blade Liger comes with a Shock Cannon, Energy Shield, and Laser Blade. These weapons not only do good damage, but do not use alot of EP and can be upgraded to do even more damage.