Magneton

This is the second and final evolutionary stage for Magnemite. Formed by several Magnemites linked together, they frequently appear when sunspots flare up. In "Sparks Fly for Magnemite," Pikachu's overly active electric cold attracts some new friends and even more enemies. When packs of Magnemite and Magneton flock to absorb Pikachu's excess voltage, they learn to regret it as Pikachu lets loose with a Thundershock sneeze!

First appearance: Episode 30—"Sparks Fly for Magnemite"