Bullet Blaster

The Bullet Blaster is Bowser Jr.'s unlockable kart in Mario Kart: Double Dash!!. It is shaped like a Bullet Bill, and like Diddy Kong's Barrel Train, is one of the fastest lightweight karts in the game. Unfortunately, this kart is also the lightest kart in the game, and can be knocked around by any other kart of any weight class. Another one of the kart's good stats is its acceleration, which is lower than the regular lightweight kart, but still better than a heavyweight. The Bullet Blaster is unlocked by completing the Special Cup in 50cc.

Because this kart is a lightweight kart, Bowser (Bowser Jr.'s default partner) can't ride on it. Therefore, Bowser Jr. needs to be paired with another lightweight to use the Bullet Blaster.

Trivia

 * In Battle Mode, for some unknown reason, the Goo-Goo Buggy's weight is tied with this kart. In any other game mode though, the Goo-Goo Buggy can easily push the Bullet Blaster around.