At the Cheats menu, press: Up, Down, Right, Right.
Armageddon cheat
Unlock this cheat by beating story mode once. This cheat enables anything to explode.
Finding a Raider
Successfully complete all the Ice levels. Start the next level. Go to the police helicopters and police cars. Pause game play and select "Quit Mission". Find a circle of boxes, climb into it, then scan the car.
First helicopter
In the vegas strip, start at the fountain. You have to be able to climb biuldings to get the heilcopter. Beside the fountain thare will be a purple and pink building, climb in and there should be a pool shaped in an L. There is a small alley infront of it, run over there and there will be a red and white helicopter. You got the news helicopter!
Note: You can only scan it once.
Floating in vehicle mode
Go to Tranquillity with Create-a-bot using any ground vehicle form. Find the building with two large smokestacks, located near the bridge between Downtown and the Junkyard. Climb up one of the smokestacks, then change to vehicle mode. If you are on the northern smokestack, face north. If you are on the southern smokestack, face south. Hold R to boost off of the smokestack. Continue holding R, and Create-a-bot will float in one place until his boost energy runs out.
Fountain ramp
Go to the Tranquillity Museum with Create-a-bot using Hot Rodder form. Find the fountain and drive up to it slowly, facing east. When the front of the car is touching the fountain, stop, then press B + R. The car will boost off of the fountain and fly high into the air. This requires takes practice, and will not work every time.
Free wanted level and have full health
While in Free play, press start, go to "Vehicle Form", then select "confirm". Now, when you exit this, you will have full health and your wanted level will be down to zero once more.
Funky Bus
Connect to the Allspark Wars server.
Get in the hoover dam without doing the missions
When you get to the hoover dam, get to the peace van place. At the back of it there's a cliff jump down and you will automatically inside the hoover dam.
Health Regeneration
Get your custom Transformer to lvl. 20 and you will unlock health regen. This means your health will slowly regenerate over time and looking for those health pickups will be no more of a problem.
Maintenance
Successfully complete the game.
Play as any Autobot in Overworld
Successfully complete the game. When you choose an Overworld at the title screen, a character selection screen will appear.
Police Brutality: Defeating the Boss
In the fight in the "Police Brutality" mission, if you are low on heath make a run for it in Vehicle mode. This also works in the Boss fight in "Know Thy Enemy".
Restore health and remove wanted level
Press Start in Free Play mode. Select the "Vehicle Form" option and confirm the choice, the press B to resume the game. Your health will be restored and wanted level will be removed.
Spotting Decepticons
If you see a car which is a different color than usual that could be a Decepticon. If it has its engine out in front of its front window it definitely is a Decepticon. If you want to battle, transform and fight it.
Super Jump
Get 2,000 WiFi tokens.
Target Exclusive Character
Go to any Target with a DS Download Station. Download the the Transformers DS trailer, and you will automatically get Skydive.
Top-down view
Get 3,000 WiFi tokens.
Unlimited energy
Get 1,000 WiFi tokens. Alternately, get a 100% completion.
Unlock Armageddon Mode
Beat the game.
Unlock Gunner
750 WiFi Tokens.
Unlock Infinite Energy Cheat
1000 WiFi Tokens.
Unlock Longhorn
250 WiFi Tokens.
Unlock Psycho Cars Cheat
500 WiFi Tokens.
Unlock Skydive
Get 2,500 WiFi tokens. Alternately, use the Nintendo DS Download Station at a Target store.