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The Plasma Yo-Yo (sometimes called Inertia Zapper) is the first Guardian of Blasterball 3, appearing on Stage 10. As its name implies, the Plasma Yo-Yo is a large blue and red ball that hangs on a string which allows it to dodge the ball by moving up or down the string. The Plasma Yo-Yo has one attack and that is to zap the Paddle, giving it Inertia (a power-up that gives the Paddle inertia physics, making it harder to control).