FusionDex.org

Thunder Stones grow on its stone body, generating the electricity it uses for self-defense. Once a year it sheds the stones to grow new ones, making the once-rare evolutionary stones far more common.

Born from the high temperatures and pressures deep underground, it defends itself by firing beams from the jewel part of its body. Its cells generate weak power that is amplified by its fur's static electricity to drop thunderbolts.