Codes

At the main menu, enter the following codes while holding Z: 

All Levels        C-Up, C-Right, C-Down, C-Left, Start
Free Buildings    A, B, A, B
Free Satellite    B, C-Left, C-Down, A
Unlimited Ammo    L, R, L, R
Unlimited Armor   (Using the D-Pad) Up, Right, Down, Left


At the main menu, hold Z + R and press C-up. If you enter the 
code correctly you will hear a noise confirming that the code is 
enabled. During game play your tank will be faster.