Merfle Barrel

A Merfle Barrel is a type of cage/barrel that the evil Shake King imprisoned the Merfles in during the events of Wario Land: Shake It!. Wario must frantically shake the tiny prison to free the Merfle so he can show Wario the way back to the start of the stage on most levels, before the Shake King nabs and kills Wario.

Destroying a Merfle Barrel will make all the Blue Shake King Blocks visible and the Red Shake King Blocks transparent.