The Ballspark is a technique in Metroid: Zero Mission that combines the Morph Ball and the Speed Booster. This technique can be accessed in two different manners. The most accessible manner requires the Ball Jump function that is incorporated in the High Jump Boots: when Samus has stored a charge for a Shinespark, she can morph into a ball, jump while still in Morph Ball form, and then propel herself in one of five directions. 
The Morph Ball launcher is the only other way to access this technique: Samus simply needs to roll as a Morph Ball into the machine and drop a Bomb. This will energize the launcher and send her flying as the Ballspark. However, the machine only has an opening pointing upwards, meaning it can launch Samus in a single direction only.
As with all other variations of the Speed Booster, Samus can destroy Speed Booster Blocks with this technique. Also, if Samus Ballsparks horizontally into a slope, she will begin rolling at high speeds; at this point, she can store a Speed Booster charge in preparation for using another Ballspark.