Transformers: Decepticons

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

Funky Bus: Connect to the AllSpark Wars server.
Love Cruiser: Obtain 250 WiFi tokens.
Psycho Cars: Obtain 500 WiFi tokens.
Stunt: Obtain 750 WiFi tokens.
Scout: Obtain 1,500 WiFi tokens.
Infinite energy: Accumulate 1,000 WiFi tokens or reach a 100% game completion.

Starscream Generation 1 version:
Use the Nintendo DS Download Station at a Target store.

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.

Police chopper bonuses:
First get the ability to scan helicopters, then scan a police chopper.
After you do that, choose that chopper and chang to completely black.
Now you are capable of doing the following options.

Note: You must have minimum 20 cars, jets, etc. for these to work.

Level 5, invisible to enemies
Nom invincible to street autobots, police cars, etc.

Level 80, can fly through mountains, intangible, and unlimited
energy.