It's an average title that could have been a bit better with a multiplayer option and longer storyline, still, any fan of the show will probably enjoy it once they have gotten over the fact that Aang can't leap around and kick butt like he does on the cartoon.
Unlike the fun and entertaining television show, the game falls well short of greatness. As a straightforward beat-'em-up, the title seems to have the right formula, including solid control and a surprisingly intuitive character upgrade system.
Even more bland and unappealing than its console cousin. If you're a psycho fan of the series, the PS2 version will probably sate you for a while, but I can't think of anyone that would actively enjoy the pared down experience of the PSP port.
The hack-'n'-slash gameplay is fun, the graphics are serviceable, and the audio is fitting, if a bit sparse, but the artificial lengthening of the game can make it tedious, due to the incessant backtracking you'll have to do, and the lack of a map.