A Chesto Berry is a type of Berry that wakes up a sleeping Pokémon. It can be obtained by using Forage on leaves with a Grass- or Bug-type Pokémon, or as a tier 1 special drop. It is also a drop from certain wild Pokémon.
Before Reforged, Chesto Berries could also be used to craft Awakenings. The recipe was removed due to many held items being far too easy to make.