The “Apples to Applin” event in Pokémon Pokopia runs from Nov. 16 at 5 a.m. to Dec. 1 at 4:59 a.m. Players can collect Syrupy Apples for Applin and trade them for apple-themed items to help befriend Flapple, Appletun, Dipplin and Hydrapple.
Source: The Pokémon Company and Nintendo