Looney Tunes - ACME Arsenal - Platform: Wii

Cheat mode:
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At the main menu, select the "Cheats" option. Then, enter one of the following 
codes at the "Cheat" menu to activate the corresponding cheat function. Enabling 
codes will disable game saves. It is recommended that you only use cheats on 
levels you have already played. If you complete a new level with the cheats on, 
you will not be able to save and must repeat the levels without using codes.

Infinite ammunition:
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At the "Cheat" menu, quickly press Down, Left, Up, Right, Down, Left, Up, 
Right, Down.