If you gain enough experience you'll gain a level. You gain experience for killing anything, or completing quests. This allows you to solve puzzles requiring a different characters special abilities, or you can switch if you like another characters fighting style. You can switch between characters on the fly with the D-Pad. Like in X-Men Legends, you can fight along side with 3 AI controlled partners. However, it does offer a better single player experience than your average Dark Alliance clone. The game seemed designed mostly after Baldur's Gate: Dark Alliance, or more specifically X-Men Legends. Battle System- Avatar: The Last Airbender is a straight up action RPG. I'm not sure why, but coming from my perspective, and I've played a TON of these dungeon crawling hack n'slashers, I say it's pretty solid. If you dig games like Baldur's Gate or Viking or X-Men Legends, then I wholly recommend this title. Some things seemed off by me, but I didn't mind the story at all. I did get an idea on it with the opening intro. I never seen the show and I didn't know anything about the characters or background on anything. The only problem, which is completely minor, is using the Wiimote while micromanaging your pieces of armor and accessories. I liked the limited Wii stuff in the game.
Avatar didn't utilize the Wii to the best of it's abilities, but they didn't abuse the Wii either. The celshading looks really good, and the backgrounds and enemies are still nice to look at.
The graphics, for a PS2 port, really hold up. I love how open the maps are, I love finding the quests from the NPCs. It's actually a deeper game in some regards.
I knew it was a Dark Alliance-type game, but I didn't know it was soo similar. Avatar: The Last Airbender was actually a much better game than I expected.