Here is the full list of all 43 Fluffy Friends achievements.
Other monster falls into the abyss
Complete level 32
Fall into the abyss
Complete level 1
Complete level 2
Complete level 3
Complete level 4
Complete level 5
Complete level 6
Complete level 7
Complete level 8
Complete level 9
Complete level 10
Complete level 11
Complete level 12
Complete level 13
Complete level 14
Complete level 15
Complete level 16
Complete level 17
Complete level 18
Complete level 19
Complete level 20
Complete level 21
Complete level 22
Complete level 23
Complete level 24
Complete level 25
Complete level 26
Complete level 27
Complete level 28
Complete level 29
Complete level 30
Complete level 31
Complete the first 8 levels
Complete the first 16 levels
Complete the first 24 levels
Meet Green Horn monster
Meet Blue Cavething monster
Meet Purple Rustling monster
Meet Mad Orange monster
Don't use buttons to complete the level
Complete all levels