Naruto: Ultimate Ninja Heroes review at Gamespy.

"Considering the enormous popularity of the Naruto anime and manga, I'm surprised that it took this long for the orange-clad ninja to make a PSP appearance in the U.S. Hardcore Naruto fans probably know that their favorite series saw a Japanese PSP release early last year, but Ultimate Ninja Heroes is a completely different game. There are similarities between the two games, but UNH focuses more on pure fighting action by eliminating its predecessor's more involved RPG-esque modes."

Full Source: Gamespy