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Nintendo DS - Transformers: Autobots cheats

Unlock Armageddon mode:
Finish the game once to play in Armageddon mode. 
In the Armageddon mode everything that is destroyed explodes.

Long Horn: Accumulate 250 WiFi tokens.
Psycho Cars: Accumulate 500 WiFi tokens.
Gunner: Accumulate 750 WiFi tokens.
Infinite energy: Accumulate 1,000 WiFi tokens or reach a 100% game completion.

Refill health and remove wanted level:
In Free play more press the Start button. Choose the "Vehicle Form" 
option and confirm the choice, the push the B button to resume the game. 

Skydive:
Use the Nintendo DS Download Station at a Target store.

Play as any Autobot in Overworld:
Finish the game once. Then go to the title screen and choose an Overworld, 
then a character selection option will display.