A peculiar stone that makes certain species of Pokémon evolve. It has a thunderbolt pattern.

Pokémon that evolve using a Thunder Stone:

First Form Bag Thunder Stone Sprite Second Form
Sealange Sealange Luminopod Luminopod
Pikachu Pikachu Raichu Raichu
Eevee Eevee Jolteon Jolteon

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