Here are a few cheats for Ben 10: Extreme Outsider Infinite Obliteration on PSP and DS:

For PSP:

Quick and easy shortcut for Every Outsider Structure: Enter the code "Primus" in the in-game cheats menu to open all outsider structures for Ben.

Ben 10 DS god mode cheat
Shortcut for Boundless Wellbeing: Enter the code "Until the end of time" in the in-game cheats menu to have limitless wellbeing for Ben.
Quick shortcut for Limitless Outsider Energy: Enter the code "XLR8" in the in-game cheats menu to have limitless outsider energy for Ben's changes.
Bypass for Max DNA: Enter the code "GeneLab" in the in-game cheats menu to maximize the DNA level for Ben's outsider structures.
Quick and easy shortcut for Opening All Combos: Enter the code "MasterControl" in the in-game cheats menu to open all combos for Ben's outsider structures.
For DS:

Bypass for Every Outsider Structure: Enter the code "Primus" in the in-game cheats menu to open all outsider structures for Ben.
Quick and easy shortcut for Limitless Wellbeing: Enter the code "For eternity" in the in-game cheats menu to have limitless wellbeing for Ben.
Shortcut for Limitless Outsider Energy: Enter the code "XLR8" in the in-game cheats menu to have limitless outsider energy for Ben's changes.
Easy shortcut for Max DNA: Enter the code "GeneLab" in the in-game cheats menu to maximize the DNA level for Ben's outsider structures.
Bypass for Opening All Combos: Enter the code "MasterControl" in the in-game cheats menu to open all combos for Ben's outsider structures.
If it's not too much trouble, note that these are only a couple of the accessible cheats for Ben 10: Extreme Outsider Infinite Obliteration on PSP and DS. Make sure to enter the cheats accurately and have a good time investigating the game with these extra capacities and highlights.