"The quick B Dasher kart returns in Mario Kart 8 and will be in the 1st DLC pack," reads a tweet from Nintendo of America. Beyond that details are scant, but it appears the "1st DLC pack" the tweet is referring to is the game's upcoming Legend of Zelda-themed DLC. That pack, which is slated for launch in November, also includes three new characters (Link, Tanooki Mario and Cat Peach) alongside eight additional race tracks and four new vehicles. It's priced at $8, though fans can purchase the DLC as well as a second, similarly immense DLC pack scheduled for release in May 2015 for $12.
Though the B Dasher has most frequently been seen alongside Mario - the duo even grace the cover of Mario Kart DS - as you can see in the above screenshot, Mario Kart 8 will allow any character to take the B Dasher for a spin. Just keep an eye out for low-flying blue shells.