Battle Fantasia is a generally solid, if limited, fighting game that might be more readily recommendable if it were a little cheaper. It's pretty, simple to play, offers a decent amount of gameplay modes, features online play, and is generally fairly balanced across the board, making it fun for both serious and casual gamers, for a while.
However, between the limited character roster, difficulty finding opponents online, lack of originality and depth, and lack of anything significant to unlock, it's really a rental at best, until the price decreases, as it most likely won't hold your interest for any longer than a week. Again, Battle Fantasia isn't bad, but it could certainly be a lot better.