To evolve Applin into either Flapple or Appletun in Pokémon Sword and Shield, you’ll need to follow specific steps based on the version of the game you are playing, as the evolution requires unique items known as Tart Apple and Sweet Apple.

Steps to Evolve Applin:

1. Obtain Applin: First, locate an Applin, which can be found on Route 5. Make sure to catch it for the evolution process.

2. Reach Hammerlocke: Continue playing the game until you reach Hammerlocke. This city becomes accessible after you defeat the third Gym Leader and obtain the Fire Badge.

3. Find the Item Giver: In Hammerlocke, navigate past the clothing shops and the second Pokémon Center. Just before you cross the last drawbridge, look for a man with brown hair wearing a red jacket.

4. Receive Your Apple: Approach the man and talk to him. You will need to give him your Applin temporarily (don’t worry, you will get it back). After a short cutscene, he will reward you with one of the two items:
– Tart Apple: If you are playing Pokémon Sword, you will receive the Tart Apple.
– Sweet Apple: If you are playing Pokémon Shield, you will receive the Sweet Apple.

5. Evolve Applin: Use the appropriate item on Applin to trigger its evolution:
– For Flapple, use the Tart Apple.
– For Appletun, use the Sweet Apple.

Additional Information:

– Exclusivity: Keep in mind that Flapple is exclusive to Pokémon Sword, while Appletun is exclusive to Pokémon Shield.
– Alternative Evolution: Although not applicable in Sword and Shield, Applin can evolve into a different form called Dipplin by using a Syrupy Apple, which relates to different gameplay mechanics outside of these versions.

Summary of Evolution Process:
– Flapple: Obtain Tart Apple from the Hammerlocke NPC (Sword) → Use it on Applin.
– Appletun: Obtain Sweet Apple from the Hammerlocke NPC (Shield) → Use it on Applin.

By following these steps, you can successfully choose the evolution path for your Applin based on the version of Pokémon you are playing. Enjoy your adventures in Galar!