Evolve Eevee into Sylveon in Pokemon GO in May 2021 The final Eeveelution will finally appear in Pokemon GO, as the Sylveon debut’s been dated. On May 25, 2021, it will show up in the second part of the Luminous Legends Y event. People will be able to evolve Eevee into Sylveon in Pokemon GO for the first time. There will also be other Eevee-related opportunities and new items. First, Niantic went over how to evolve an Eevee into Sylveon in Pokemon GO. As with Espeon and Umbreon, two other Eeveelutions that involve friendship levels, you’ll have to set the character as your buddy. However, instead of only walking with it, other heart-raising activities like taking pictures, playing, and feeding berries will help. There will also Eevees in 7km eggs, Eevees more often in the wild, other evolved forms in Raids, Eevee Field Research Tasks, and a Sylveon avatar hoodie.