Here is the full list of all 33 Chicory: A Colorful Tale achievements.
Collect all decor
Destroyed the Brush.
Grew a brush
Collect all clothing items
Pick up all litter
Reveal 100% of the map
Find all lost kids
Discover all Brush Styles
Solve all of Oats' outfit riddles
Planted the Brushflowers
Shook Chicory's hand
Sang with Chicory
Delivered all of Artichoke's mail
Deliver mail for Artichoke
Collect 50% of decor
Solve the mystery of stolen furniture
Painted your wielder self-portrait
Pick up 50% of litter
Started the Wielder Trials
Complete all art classes
Fill in Gelato's photo gallery
Collect 50% of clothing items
Met Queen Drosera
Reveal 50% of the map
Collect 25% of decor
Pick up 25% of litter
Discover 50% of Brush Styles
Collect 25% of clothing items
Chicory painted you
Had a conversation with Chicory on the phone!
Met Chicory!
Return Beans' kids to her
Pick up Chicory's brush