The characters...just a little weird.
I think it kinda sucks that you have to get to do a spell once and then you have to get another stone to do it again. I think the spells should be performed like in Final Fantasy: Crystal Chronicles for the Gamecube where you only have to get a stone once and get you infinite spells until the next level.
The single player is not that fun. Multi-player, definitely. That is mainly why i bought it. Although I still think Nintendo has to make a keyboard for the DS that you can insert in to the game-boy slot. I'm still looking forward to the KH: 358/2 Days game. It's going to be the best videogame ever to go out on the Nintendo DS.