Characters like Luffy, Sanji and Chopper definitely look like their television counterparts, and the various scenes that the mini-games take place in go along with the show's general style very well. Whether you are racing against three other opponents or taking part in some rhythm game, you can't help but think about the show when looking at the visuals of Pirate's Carnival.
As for the game's sound, there isn't really a whole lot to talk about here. The music has the same feel as the series, while the few voice clips used are definitely either lifted from the show itself or newly recorded by the same actors for this game.