Applin is a rare Pokemon in Pokemon Sword and Shield, and its evolution depends entirely on your version of Gen 8. Learn what you'll need to get Flapple in Pokemon Sword or Appletun in Pokemon Shield written below or watch the video above.
For even more guides, be sure to visit IGN's Pokemon Sword and Shield guide.
If you're still on the hunt for Applin, you can find it in a few places. Applin does not appear in the overworld, but you can find it on Route 5 in surprise encounters by running through the tall grass.