Just to spice things up, you now have TWO characters!
Gameplay: Just like all mario karts this game is all about racing. Although there are some little game type tings you can play such as 'balloon challenge' in where you drive around and try and hit other cars to pop a balloon, first to loose all their balloons loses.
Graphics: this game has very good grpahics. they are all nice and sharp and are well done.
Sound: the sound in the game is background music, the car horns, grunts from the charcters when they swap positions in the car, the calls they make to one another..and thats about it. All the sounds are pretty clear...
Value: this game is based on replay value. every race is different. and if u have friends you can vs up to 4 of them at a time. or you can have both of you in the one car (at the same time). in other words this game doesnt get boring unless you over play it.
All in all: This is a really good mario kart game and worthy of the well known title. the game features items from previous mario karts. it also has the characters from other mario karts, they also introduce new ones you can unlock (i wont tell you who they are or ill spoil it). The multiplayer is really good and the side games are (even though there are only 3) are good as well.