Here is the full list of all 43 Uncle Nook's Monster Emporium achievements.
Don't give up
You Died 50 Times
Banish 1 Chicken Boy
Banish 10 Chicken Boy
Banish 100 Chicken Boy
Beat Ending 1
Beat Ending 2
Beat Ending 3
Beat Ending 4
Banish 1 Falling Hand
Banish 10 Falling Hands
Banish 100 Falling Hands
Banish 1 Floating Face
Banish 10 Floating Faces
Banish 100 Floating Faces
Banish 1 Gaint Hand
Banish 10 Gaint Hands
Banish 100 Gaint Hands
Find the Golden Key
Banish 1 Grabber
Banish 10 Grabbers
Banish 100 Grabbers
Banish 1 Long Man
Banish 10 Long Men
Banish 100 Long Men
Banish 1 Meat Man
Banish 10 Meat Men
Banish 100 Meat Men
Banish 1 Ice Slug
Banish 10 Ice Slugs
Banish 100 Ice Slugs
Banish 1 Spider
Banish 10 Spiders
Banish 100 Spiders
Banish The Broken
Banish The Chicken Man
Banish The Skinless
Banish 1 Void Walker
Banish 10 Void Walkers
Banish 100 Void Walkers
Banish 1 Zombie Head
Banish 10 Zombie Heads
Banish 100 Zombie Heads