Ben 10: Alien Force Cheats (PSP)

At the "Bonus Content" menu, select the "Enter Code" option. Enter one of the following
codes at the "Secret Cheat" screen to unlock the corresponding cheat option. Then, enable
the unlocked cheat at the "Secrets" menu.

Invincibility

Enter Kevin, Big Chill, Swampfire, Kevin as a code.

Infinite Aliens

Enter Ben, Swampfire, Gwen, Big Chill as a code.

All combos

Enter Swampfire, Gwen, Kevin, Ben as a code to unlock all combos.

Level Lord

Enter Gwen, Kevin, Big Chill, Gwen as a code.

Goop

Enter Ben, Swampfire, Kevin, Big Chill as a code.

To get goop as aalien go to the code menu and enter Ben Swampfire Kevin BigChill as a code