My nominees:
Jeanne D'Arc (PSP)
More Brain Training (DS)
The Legend of Zelda: Phantom Hourglass (DS)
The Golden Compass (PSP)
Luminous Arc (DS)
Final Fantasy XII: Revenant Wings (DS)
Pokemon Diamond/Pearl (DS)
WWE Smackdown Vs. Raw (PSP)
Final Fantasy Tactics: The Lion War (PSP)
Contra 4 (DS)
In my opinion:
The Legend of Zelda: Phantom Hourglass (+1)
(my apologies if there's already been a thread on this, I didn't see one.)