Here is the full list of all 19 I Love Finding Wild Friends achievements.
Adopt a Wild Friend
Adopt most of the Wild Friends (50% and above).
Adopt all Wild Friends
Use Hint for the first time.
Finish a location with 6x Multiplier and get a Golden Star.
Find a morphing object.
Find most of the morphing objects (50% and above).
Find all of the morphing objects.
Finish a butterfly puzzle.
Finish most of the butterfly puzzles (50% and above).
Finish all of the butterfly puzzles.
Finish a color-by-pixel game
Finish all color-by-pixel games
Have a 6x Multiplier fully deplete.
Get a Bronze Star for the first time.
Get a Silver Star for the first time.
Get a Golden Star for the first time.
Complete the 18 standard locations.
Finish all locations.