DS's best fighter!
The gameplay is basically smash bros. The differences are you get a bar in the top corner. When it is full a number will come up which indicates that you can use a special move by pressing X. The other difference is that you are inclosed in the arena but you can get out by breaking the walls.
The graphics are colourful 2-D and the game is pretty long.
The problems is simple: its in japanese. On some missions you need to look up on an FAQ what to do. A nice feature of the game is being able to make your own deck to play as the characters you want to put together. The trouble is that its too confusing in japanese.
Overall, this game is brilliant and is worth any DS owners money. If you don't mind the language barrier and you don't mind importing it GET IT!