With the new evolution mechanics in Pokémon Legends: Arceus, many players are finding that Pokémon no longer automatically attempt to evolve. Instead, you must manually evolve them once the Pokémon has met specific conditions. One of these conditions is that the Pokémon must hold a Thunder Stone to unlock its next form.

You could force a Pokémon to evolve in earlier games if it leveled up while holding a Thunder Stone. However, with the new requirements, you’ll find that this is no longer possible for the vast majority of Electric Pokémon. You can only apply it to specific ones. Here is the list of all the Pokémon that require a Thunder Stone.

Note: The list below is based on preliminary information made available when the game was first released. We will update the list if we find that more Pokémon can use a Thunder Stone.

  • Jolteon: Have an Eevee hold a Thunder Stone if you want it to evolve into Jolteon, one of its second forms.
  • Pikachu: Have a Pikachu hold a Thunder Stone to have it evolve into a Raichu.

Related: Where to find Eevee and how to catch in Pokémon Legends: Arceus

Once you give these Pokémon a Thunder Stone and evolve them, the Thunder Stone will be consumed. Since your primary goal in the game is to acquire every Pokémon for the Pokédex, you must get at least two Thunder Stones throughout the game to get all the evolutions listed above.

If you end up with a spare Thunder Stone, it’s best not to evolve a Pokémon to an evolution you already have in your Pokédex. Instead, save the extra ones to use them on the other Pokémon listed above that you haven’t yet discovered.

Want more help with the game? Be sure to check out our Pokémon Legends: Arceus homepage to see the latest news, guides, and content!

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