Codes should be entered at the Main Menu screen, except the two codes marked otherwise. For all the codes, a different sound that you wouldn't normally hear should happen. Some of the button presses have to be done rapidly, or else they won't be triggered.
Effect Code Faster Tanks Hold Z + R, and press any one of the C Buttons. Free Buildings Hold Z and then rapidly press A, B, A, B. Free Satellite Hold Z, and then rapidly press B, C-Left, C-Down, A. Infinite Ammo Hold Z and rapidly press L, R, L, R Infinite Armor At the Options Screen, hold Z and rapidly press Up, Right, Down, Left (on the digital pad). Unlock All missions At the Options Screen Menu, hold Z and rapidly press C-Up, C-Right, C-Down, C-Left, Start.
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