Baller

The Baller is a special weapon in Splatoon 2. It takes the form of a plastic bubble.

Splatoon 2
When using the special move, an Inkling will enter the Baller. This allows them to move quickly and blocks incoming damage taken while inking the ground as they move, and also allows them to walk up walls. If is held while in the bubble, or after a set period of time, the Baller explodes, covering the surrounding area in ink. The Baller being inked results in it shrinking, eventually disappearing, instead of the Inkling using it taking damage.