The B Dasher makes its first appearance in Mario Kart DS. This is one of Mario's karts, the others being the Standard MR and Shooting Star.
It is one of the heaviest karts in the game, and its weight is tied with the ROB-BLS. It is unlocked from the start
Mario Kart 7
It reappears in Mario Kart 7 as an unlockable kart part, having little changes to its appearance from its original iteration.
The B Dasher is tied with the Blue Seven and Bolt Buggy for having the lowest acceleration of all kart bodies. Fortunately, it's tied with the Blue Seven, Bruiser, and Zucchini for having the highest speed of all kart bodies, and it's the fastest kart body to have a positive handling boost.
A CPU-controlled Mario is more likely to be seen driving on this body.
Mario Kart 8
The B Dasher once again returns in Mario Kart 8 as one of the vehicles in The Legend of Zelda × Mario Kart 8 downloadable content pack.