Here is the full list of all 17 Button City achievements.
Join the Fluff Squad
Get over 10,000 buttons
Collect all room decorations
Collect all Gobabots
Collect all wearables
Collect all consumables
Pet all the guard bots
Kick the soccer ball off the level
Watch all TV shows
Get a 1:30 or better in rEVolution Racer
S rank on all Prisma Beats songs in hard mode
Play lemonade mini game 10 times
Drink 10 sodas
Use coffee grounds and beat an arcade game
Complete the Story
You went full beard mode and did every side quest.
You helped everyone around town.