Ben 10: Protector of Earth Unlockables II (DS)

Ben 10: Protector of Earth is a PSP title based on the animated television series called Ben 10. The game was launched on several platforms, with the PSP version being released in the US on October 30, 2007, in Asia on November 5, 2007 and in Europe and Australia on November 9, 2007. The game was developed by High Voltage Software and published by D3 Publisher.

In Ben 10: Protector of Earth, you get to control Ben and five of the ten creatures he can control in the show. Another dimensional crisis is about to engulf the Earth and Ben is the only one who can stop the evil from spreading. Unfortunately, all his alien powers have been stolen, so he and his family set out to recover his amazing abilities and stumble across a plot to suck the Earth into the Null void. The main part of the game consists in controlling the Omnitrix and slowly learning to take charge of Four Arms, Heatblast, Cannonbolt, Wildvine and XLR8. He can even upgrade these creatures, giving the player the possibility of performing more than 80 combos.

UNLOCKABLES

Master Control
Successfully complete the game. Start a new session and collect all 30 Sumo Slammer cards. Enter any level under the "Insane" difficulty. The Master Control will be enabled, with unlimited Omnitrix battery, and the ability switch between aliens without reverting back to the human form.

Omnitrix aliens
Complete the indicated level below to unlock the corresponding Omnitrix alien.

Cannonbolt: Complete Hoover Dam. 
Wildvine: Complete Seattle Space Needle. 
XLR8: Complete Grand Canyon.

Here's a video of the game: