Eevee is an incredibly popular Pokémon and can evolve into various evolutions depending on what method you use. While some evolve through evolutionary stones, many do not, including Sylveon. This may leave you wondering how to evolve Eevee into Sylveon in Pokémon Scarlet and Violet.
How to get Sylveon in Pokémon Scarlet & Violet
To evolve Eevee into Sylveon in Pokémon Scarlet and Violet, you must meet two conditions—high friendship and learn a Fairy-type move. Eevee will only evolve into Sylveon if it has a high enough friendship and knows a Fairy-type move. If you do not have a Fairy-type move, Eevee will instead evolve into Umbreon or Espeon through friendship.
Eevee will Baby-Doll Eyes at level 15, making it the first Fairy-type move. You can also use a TM to teach Eevee a Fairy-type move, such as Charm. Alternatively, you can find a wild Tera Sylveon and bypass having to evolve Eevee. We found ours in North Province Area Three at the marked location below.
How to raise friendship quickly in Pokémon Scarlet & Violet
You can increase Eevee's friendship through several ways to quickly evolve it into Sylveon. The best way would be to have picnics with it, where you can feed it sandwiches, play with it, or give it a bath. Repeat this, and it will quickly increase Eevee's friendship. You can also feed it berries that raise its friendship, but these also decrease stats, so you may not want to go this route.
Finally, you can give Eevee the Soothe Bell to hold, as this held item will increase Eevee's friendship. If you are wondering if Eevee's friendship is high enough, head to Cascarrafa and find the Friendship Checker. You can find this NPC standing next to a Marill in the main plaza of Cascarrafa.
For more information on Pokémon Scarlet & Violet, check out How to evolve Eevee into Leafeon in Pokémon Scarlet & Violet and How to evolve Eevee into Jolteon in Pokémon Scarlet & Violet on Pro Game Guides.