You can play as Gandalf, Aragorn, or Legolas. Plus there are lots of unlockable characters. The LOTR Trilogy for the GBA is simply a Diablo clone. It's not the best Diablo clone, but it's good enough for the an old system like the Gameboy Advance.
Like Diablo, you hack and slash your way out of any situation. You have a button where you can activate special attacks to help you kill hordes of goblins and orcs. There are also skill trees and magic, not unlike the Diablo 1 system.
If you want an action/RPG on the go, give the LOTR series a try. You can even play co-op with your friends if you have a link cable. I'm not 100% sure if you can use the wi-fi of a DS to link a game. All in all, this game is a solid 7 out of 10 in my book.
