Evolution guide
How to evolve Decidueye.
Decidueye is the final form of its evolution chain. Here's the full lineage.
Rowlet No. 0722 Level 17
Dartrix No. 0723 Level 34
Level 36
Level 34 in Hisui (yields Hisuian Decidueye)
Level 36 in Hisui (yields Hisuian Decidueye)