As it may lack originality, the multiplayer makes it up for the game.
The game does well what it should, the multiplayer. Besides that, the game lacks originality and could have better modes (party mini-games), more selectable characters and a better way to unlock new chars.
The coin system is frustrating and may take you hours and hours to unlock the 8 unlockable chars, but it's actually.. worth it.
So if you're a fan of these anime series, get some friends together and expect to have a lot of fun, cause the battle system is really catchy and may entertain you for hours.
Worth the buy? Yes.