The game is really not that good when it comes down to the actual gameplay. The graphics are some of the absolute best on the system and EVERY line in the game is voiced, but the gameplay is repetitive and the touch controls are unresponsive. Enter a battle, and it's TAPTAPTAPTAP, win. That's about it. Plus your characters move around sluggishly and don't respond well to touch presses when you need to jump or even move.
I had one of the few flashcards that this game actually ran on from the start- Supercard DS-One. That's not fair to others, but I can assure you that the game is little more than flashy eye candy with nice voice acting. By far the funnest parts of the games are the cinematic action sequences where you need to make contextual stylus sweeps in order to succeed in acrobatic segments. It's like Dragons Lair, and about as fun, except without the cool death animations.
This game is really only worth playing if you want to see what the DS is REALLY capable of in terms of graphics. It feels more of a fancy tech demo than a game. The game IS gorgeous, but that's never enough since games need good gameplay to succeed. It has some really fun moments, but the game really isn't that big of a deal to bother yourself over.